Is your feature request related to a problem? Please describe.
A part of us likes to have better things and we must work to get it, many mods add many things, in this case, materials better than netherite, so, it would be interesting if some favorite mods are integrated into a favorite backpack mod...
Some mods like:
Gobber / Gobber 2 add "Gobber Ingot", "Nether Gobber Ingot" and "End Gobber Ingot".
Ores Above Diamonds add "Amethyst" and "Black Opal".
Oh The Biomes You'll Go add "Ametrine" and "Pendorite".

Describe the solution you'd like
Using those materials you can make superior upgrades to be able to save more things or maybe put one more table.

Describe alternatives you've considered
The improvements should not appear if certain mods are not detected, by the way, leave a map on obtaining these minerals.

A last thing, changing the subject, I (Alonso Flores user) made a Mexican Spanish (es_mx) translation in Localazy, now if a player play minecraft in Mexican Spanish but there is only the file (es_es), they will see it in English (en_us), so I make some changes in native language.

Holy moly. This would be a game changer. I NEED THIS!!!

Complete overhaul of inventory
https://www.curseforge.com/minecraft/mc-mods/travelers-backpack
https://www.curseforge.com/minecraft/mc-mods/travelers-backpack-fabric/files/all?page=1&pageSize=20
In latest upgrades update for all mod loaders for 1.21
Increased max backpack capacity to 99 slots