MaiAo Have you tried Labs Unreal Groom Export SOP? It's new. Came out last week.
is there a reference file for this? I tried exporting with the unreal groom for UE5preview1 but I have to reimport and translate before exporting another ABC to make it import aligned correctly to the fbx in UE5. If I try to use UE5's import rotation it doesn't update, and if I use the translation in the UEgroom export, it looks like it's not rotating correctly. I'm also not sure how to properly pipe in the groom from the guides. I can get it in and match the fbx 1:1 if all the hair is guides though.