Hi! I am making a vanilla+ modpack for my friends and I'm finding that JEI shows every item in the game as enchantable with Reactive. I'm afraid this will be confusing (and it's a bit cluttery), so I wanted to disable the enchantment. Unfortunately, I don't see a file for it in the config.

Is it possible to disable this enchantment, or at least get it to only apply to specific items?

Hello,
Reactive can be applied to every item in the game, that is its intention. You cannot disable enchantments.

Perhaps ask in the JEI discord, there is generally a way to hide JEI entries using a datapack or kubejs script.