Generate different heads in Ornatrix App, apply one groom with an auto-aligned scalp, then turn a custom head into a MetaHuman with From Custom Mesh and Auto Solve and groom it again.
https://dev.epicgames.com/community/learning/tutorials/KJW8k/unreal-engine-one-groom-on-different-heads-custom-head-to-metahuman-with-ornatrix-app