Importing twinhandmovement’s file into UE5 worked for me. I was also able to get the export to for hair made entirely in Blender to work this time from Blender 3.2.2 by selecting “Viewport” settings from the dropdown instead of “Render” settings, along with scale 100, frames 1 to 1, and selected + visible objects. I’m not sure why that made a difference, since Display amount and Render Amount under Children were both set to 5.
Edit: And to clarify, this was hair made with the older particle hair system, and “show emitter” was toggled off as well