Describe the feature

I'm not sure how to properly install the datapack

Reasons why this should be added

I downloaded the file for 1.21.1, AllMobHeads_V10.4_snapshot_1.21.4, unzipped the file and put it in my datapacks folder for my modpack, but it still hasn't shown up properly. I did notice there's different versions inside the folder am I supposed to only have one of those versions?