Is it possible to completely disable the drop of affix items from regular mobs? So that such loot would only drop from bosses? I read that something like this can be changed via datapack, but I don't understand where to change it? Can you point me in the right direction?

Random affix items on entities are applied via an apothic_augment - specifically this one https://github.com/Shadows-of-Fire/Apotheosis/blob/1.21/src/generated/resources/data/apotheosis/apothic_augments/random_affix_items.json

thx

Can you tell me how to make this datapack correctly? Maybe there is a template? I replaced application_chance with 0, but the items still drop.

And another question. Are the gems that drop from mobs also regulated by this file?

but the items still drop.

Restarted the server and it seems like affix items aren't dropping. The /reload command had no effect. But gems are still dropping

I answered my own question:
https://github.com/Shadows-of-Fire/Apotheosis/blob/1.21/src/generated/resources/data/apotheosis/loot_modifiers/gem_entity_drops.json
and
https://github.com/Shadows-of-Fire/Apotheosis/blob/1.21/src/generated/resources/data/apotheosis/loot_modifiers/gem_entity_drops_from_real_players.json