@bxkachii Yes, that’s correct!
The plugin is specifically meant to map Mixamo characters and animations to the shipped UE5 skeleton, as far as I’m aware. The UE4 skeleton is very doable without a plugin, and if it’s a skeleton from anything else, it’s probably doable by hand, Mixamo is great that way! It’s just that the UE5 skeleton is a bit advanced right now, and Mixamo hasn’t caught up yet with ensuring their exported skeleton covers the bases with the UE5 skelly. 