Any shot you could make this work with curios/adorned (the curios fork for 1.21+)? Would absolutely love if you could! If not totally understand just figured id mention it!

Adorned is NeoForge only and simply just the old Curios mod on a newer version. Accessories has cross platform support on multiple modloaders, is being actively updated, and has a shared API on 1.20 and 1.21.

You should switch to Accessories, and install the Curios Compat Layer. It should be a drop-in replacement.