I really like some of the concepts added by this mod. I‘m sry to say but I don't like the charm part very much. I checked the config file and realized that charms cannot be disabled individually. I had to remove and hide them from my mod package through mods such as kubejs. Is it possible to add a function so that players can disable certain items individually through cfg without modifying recipes and datapacks?
Sorry, I used a translator, my English is not very good :D

I have just added config option to switch charms off in 1.20 and 1.21.1 releases.

Also with bat wings, that's not how item tags work - item tags are used to say that different items are in a specific category which then is mostly used in recipes to require any item from that category, but you still get all those different types as drops in this case in the world, you can just use one instead of the other if supported.
And I tried quick search and don't see any other mod using tag for bat wings so if I added it that would do nothing because only Reliquary bat wings would be supported in reliquary recipes and other mods wouldn't support these in their recipes. If there's a more of an ask for this and multiple mods add the tag I can add it in the future, but this is literally first time I heard about it.

Oh, by the way, can you add tags to bat wings? Many mods add bat wings. Sometimes a bat will drop three types of bat wings.