I can't seem to get it to work at all for Fabric 1.21
I've tried multiple different configurations
Simplest is just using fabric + this mod.
it prints no errors, grindstone with enchanted item + book shows no result.
And if you put an item with enchant in with NO book, then it just infinitely dupes the item...

That's weird. The mod loads, apparently, otherwise it wouldn't have any effect (does the "Reading config." line appear?).

I don't know what would cause these issues. Since compatibility issues are out of the question, it should be working. Unfortunately, I can't test it right now, so it's possible that the mod's just broken on 1.21 right now? Even though I thought I tested the version before releasing it.

I can try to reproduce the issue in a few days.