https://github.com/UpcraftLP/Soulbound

Current behavior: items in the backslot/beltslot with the soulbound enchantment will drop on the ground

Expected behavior: items in the backslot/beltslot with the soulbound enchantment stay in their slots

This fork isn't released on curseforge yet. I will add compat when it is

Have no plans to add compat from my side.