Here is a way you can export GROOMS from Unreal to other tools.
Ornatrix UE: Procedural groom export in UE5 - YouTube] Ornatrix UE: Procedural groom export in UE5 - YouTube
My suggestions is to get 4.26 installed, it came wth a Experimental Cards Generation Tool Plugin 
Then migrate Groom with Cards back ito 5,2! :