Your mod is missing some of the LE features and mechanics that existed in some of the editions.
I can mention a long list of features and mechanics of these that are less difficult to add to your mod:

(OBS: You don't need to add all of these things I mentioned in one single update. Notice I would be editing most of the time to add more information or to fix the wrong things I wrote)

• Potions of Decay, Splash, Lingering and Tipped Arrow variants. (They all gave Wither II effect. Normal variants have 40 seconds of duration, Splash variants have 30 seconds, Lingering variants have 10 seconds and Tipped Arrows have 5 seconds. They can only be obtainable in Creative Mode.)

• The breaking time speed in Creative mode was slightly faster in LE, going to 3 to 4 blocks per second while holding the "Action" button in the direction of the blocks. With a controller, the player does a continuous attack of 4 clicks per second in Creative Mode in the direction of air and the mobs too, when holding the "Action" button in the controller.

• Fire Resistance causes the entity and the player to not have a burning animation at all, causing the view of the player to not be blocked. (Should be the Gamerule command available in the Host Options too)

• In Update Aquatic versions of LE, most of the blocks can be waterlogged or placed inside the water too. That isn't possible on Java Edition. I tested in PS4 Edition to show the possible blocks:
  Banners;
  Beacons;
  Beds;
  Bells;
  Brewing Stands;
  Buttons;
  Cakes;
  Carpets;
  Cauldrons (They fill up with water when );
  Cobwebs;
  Composters;
  Daylight Detectors;
  Dead Bushes;
  Doors;
  Dragon Eggs;
  Enchanting Tables;
  End Portal Frames;
  Fence Gates;
  Flower Pots;
  Grindstones;
  Heads;
  Hoppers;
  Lecterns;
  Levers;
  Monster Spawners;
  Pistons (Piston heads extending into water do not become waterlogged, but can be waterlogged manually);
  Pressure Plates;
  Redstone Comparators;
  Redstone Repeaters;
  Shulker Boxes (and their dyed variants);
  Stonecutters;
  Tripwires;
  Tripwire Hooks;
  Turtle Eggs;
  Vines;

• Cauldron can also be filled by dumping a Water Bucket on the block above the Cauldron. Once the water block is removed, the Cauldron is filled to the full level with water.‌ (I tried in LE of PS4 and it worked)

• Damaged Anvils can drop into Normal/Fixed Anvils when broken by the player. (Option in the Gamerule Command)

• Potion particles appears when you fill/collect the potion in a Cauldron.

• Cartographer Tables can turn Paper into Maps in PS4 Edition.

• Stronghold Chests can generate Emeralds and Ink Sacs. (Altars generate Emeralds, Storerooms generate Ink Sacs)

• Legacy style GUI to Command Blocks, Jigsaw Blocks, Structure Blocks and Test Blocks.

• Illager Raids have the same boss health colors as the Wither and Ender Dragon when "Legacy Boss Health" option is enabled.

• Campfires can be lit by players and mobs standing on top when they are on Fire in PS4 Edition. (Could apply to candles for consistency)

• Players are completely immune to damage when turned Invisible option on, including damage from the mobs, arrows, effects, the void and kill command. (Should replace the Invisibility and Resistance effects)

• Death messages are also produced upon the death of a pet Horse, Donkey, Mule, Llama, or Trader Llama.

• A third-person animation of the player trying to throw a Trident.

• Collecting Experience Orbs plays highed pitched sounds, except when the player levels up, like in LE.

• Levers and Buttons placed in side of Pistons can activate them without being destroyed, like in LE.

• Worn Heads, Carved Pumpkins, and Banners flash red when the entity takes damage.

• Hitboxes of tall plants such as Tall Grass, Large Fern, Lilac, Peony, Rose Bush and Sunflower are smaller in comparison to Java.

• Bone Meal, Ink Sacs, Lapiz Lazuli and Cocoa Beans could still be used as dyes in PS4 Edition. They could generally substitute for White Dye, Black Dye, Blue Dye and Brown Dye in crafting recipes and for use in dyeing items, mobs and water cauldrons.

• Cod, Samon, Tropical Fish and Pufferfish drops Bones instead of Bone Meal when killed. (Roll Chance = 25% | Default = 1-2 Bones | Looting I = 2-4 Bones | Looting II = 3-6 Bones | Looting III = 4-8 Bones)

• Pillager drops normal Arrows when killed in PS4 Edition. (Roll Chance = 100% | Default = 0-2 Arrows | Looting I = 0-3 Arrows | Looting II = 0-4 Arrows | Looting III = 0-5 Arrows)

• Blazes drops Glowstone Dust when killed. (Roll Chance = 100% | Default = 0-2 Glowstone Dust | Looting enchantment doesn't increase the drop looting)

• Illagers drops special loot when spawned from Raids on PS4 Edition. Additionally, depending on difficulty, they have a 65% chance of dropping on Easy and Normal, while 80% chance of dropping on Hard:
  0-1 Emerald (10⁄39 chance)
  2-3 Emerald (5⁄39 chance)
  4-5 Emerald (2⁄39 chance)
  1 Enchanted Book (2⁄39 chance)
  1 Iron Axe (5⁄78 chance)
  1 Iron Shovel (5⁄78 chance)
  1 Iron Pickaxe (5⁄78 chance)
  1 Iron Sword (5⁄78 chance)
  1 Iron Helmet (5⁄78 chance)
  1 Iron Chestplate (5⁄78 chance)
  1 Iron Leggings (5⁄78 chance)
  1 Iron Boots (5⁄78 chance)

• Iron equipment from raider drops has 50% chance of being enchanted with random enchantment(s) at a low-to-medium level.​ (Levels I-III)
• Iron equipment from raider drops is always damaged.
• Enchanted books from raider drops have random enchantments at a high level, including treasure enchantments.
• Emerald is both a regular raid drop and an additional drop.
• Only emerald drops are affected by looting enchantment, increased by 1% per looting level.

• Enderman teleports when hit by a player or a mob.

• Horses, Donkeys, Mules and Llamas leave the eating particles and plays the player eating sound effect alongside their own eating sound effect when feeding to them. (Camels should have these effects too.)

• Wandering Traders are able to sell Lilacs, Rose Bushes, Sunflowers, Peonies and Red Sandstone.

• Shrubs are able to drop Wheat Seeds when broken, having the same drop mechanics as Short Grass.

• Dying and Fallen Trees were able to generate in the overworld before 1.21.5 update.

• Wall Torches have a pipelined and stretched side models in LE, just like in Bedrock Edition and older versions of Java Edition. (Can be toggled in Graphics menu. Applies to all torch variants)

• The shield blocking sound effect plays when attempting to block the attack of entities with a Sword, like it happens in the versions before the PS4 Edition. (When "Legacy Sword Blocking" option is enabled)

• Skeleton Horses can now be ridden underwater and don't need to be tamed or saddled anymore. Can be toggled using Gamerule command or Host Options.

• Villagers spawns with professions via spawn egg or commands, can be toggled using Gamerule command or Host Options.

• Players can only use the Shields when crounching and riding a horse or a boat, like in PS4 Edition. Doesn't affect the speed of the player. Can be toggled using Gamerule command or Host Options too.

• Zombies don't raise their arms when targeting entities in LE. Can be used as a option in the Graphics menu to your mod. (Applies to Zombies, Husks, Zombie Villagers and Zombified Piglins)

• Turtle Eggs plays their own breaking sound alongside the metal sound when the player breaks with his hand in Creative Mode.

• Dispensers can thrown Tridents in the direction they're facing as a weapon, instead of dropping them as items. Tried in PS4 Edition.

• Grass Blocks can be composted in a Composter, having 30% chance of Composting Chance per item.

• Blast Furnaces can smelt Sand and Red Sand into Glass.

• Breaking a Melon with a tool enchanted with Fortune increases the potential number to a maximum of 10 slices in LE, instead of 9 slices.

• Blue Wither Skulls can be deflected by hitting it with an empty hand, weapon, tool, throwable projectiles such as Tridents, Arrows, Snowballs, and Throwable Potions and Explosions in LE.

• Bad Omen and Hero Of The Village effect should play the screen effect of Totem of Undying with their own icons instead, Like in PS4 Edition. (Bad Omen screen effect should play only in 1.20.1-1.20.6 versions)

• In 1.21 and upwards, Raid Omen and Trial Omen effects should trigger the screen effect instead of Bad Omen effect when the player obtains them, to be consisted with the updates.

• A camera animation when you are about to sleep, like the versions before the PS4 Edition. (PS4 Edition glitched/removed the camera animation for some reason)

• Shields could knockback the mobs when they try to attack the player defending with his shield.

• A Gamerule command to make the off-hand slot to hold only specific items: Arrows; Tipped Arrows; Spectral Arrows; Shields; Firework Rockets; Totem of Undying; Filled Maps; Explorer Maps.

I may have exaggerated a lot and I know it will be harder to code all of these features into one version, but great mod nevertheless. I mentioned these features just to improve the experience of this mod to the player.

Also I researched these features by testing in the LE PS4 Edition that I have on my PlayStation account too.

Mining (or pick blocking) a damaged anvil actually technically gives you a damaged anvil, it just has the same texture and name as an undamaged one and if placed back down, it turns into a non-damaged anvil. Damaged anvil items don't stack with undamaged anvils in the inventory. https://youtu.be/EazaXjLXT_A?t=233 as seen here, this wasn't always the case. Also a lof your suggestions are already suggested on the legacy4j discord server. I am not sure if this is the right place to suggest features. I think it is better to suggest them in discord and make only one post per suggestion. I was wondering if you get death messages from tamed horses, donkeys, mules etc. on PS4 too, since it is the case on bedrock and I was wondering, whether dispensers can shoot tridents thanks for saying that PS4 has these features.