Hello Mate.
I am doing crowd as well in Houdini and i wanted to imported to UE5, i found a really cool tutorial (https://www.youtube.com/watch?v=tqc24KukrSY&t=334s), that you might have seen it.
The error i am getting is that the FBX is exporting two root bones instead of one
Still can not find a way to fix this issue