I play on a Mac, I'm not sure if that matters since it worked every time up to this point. This is what's wrong, for example. I have installed a random datapack, a snow golem with a melon head instead of a pumpkin head. But if I install the data pack and make a melon golem, the head is instead of a melon block a item melon piece.
The same is with every other Datapack mob, for example, a copper golem Datapack (a vote mob from Minecraft live 2021). If I spawn a copper golem from the pack, it's just a floating walking copper ingot, as a item. Just a floating walking item, the same in every other datapack mob, just one or multiple floating walking items, random items. This annoys me very much and I don't know what to do. The datapacks don't come from the same person or download site. It's just every mob from datapacks. Can anyone please help me with this problem?
I have some photo's for more details. Can you please help me?