Describe the idea
Making tipped arrows in the cauldron is awesome. And it could be better to see more bedrock features in JE, making it an equivalent to Bedrockify (Fabric)

Describe how you think this feature would fit in vanilla

• Riptide deals range attack
• Impaling deals more damage to any mobs in water
• Trees with vines / fallen tree
• Standing on a chest to prevent it from being opened
• Frozen leaves in Snow Plains, etc.
• Pistons can push chests, hoppers, etc.
• Break cactus by placing a sign
• Sugar Cane is able to be bonemealed
• Fish drops bone
• Map variant without compass
• 3D buoy for fishing rod
• Potion of Decay
• Infighting within illagers
• Swimming motions of Drowned
• Snow can fall like sand
• Wither explodes on death
• Blue wither skull can be deflected
• Random potion in cauldron found in Witch Huts
• HUD animation for Bad Omen / Hero of the Village
• Persistant coordinate on HUD and its gamerule
• PVP gamerule
• Quick command button
• BE-style UI with close button
• Maybe some tweaks for better touchscreen controls? (in combination with boat-based android launchers) (or even launchers designed for PCs with touchscreens, if any)

I don't make this mod to port bedrock to java. I make this mod to add features I think belong in the game. Most of the features you suggested sound like things I have no interest in adding (and quite a few seem like random visual changes that are not even worth changing should I be interested). I'll look over the list again later though