The best option I have found to date is still to make hairs thicker, it will work with scalp hair, but… It won’t with face hair, like eyebrows and a bear, because if you make those hairs as thick, then your hairs will look unrealistic, so it’s a win and loose relationship, the other option is to use face hairs with translucent materials while using scalp hairs with masked materials, but then you also get unrealisitc face hairs… but honestly you could fake face hair shadows, so you can still use masked materials for the scalp hair, and face hair without shadows and fake those shadows.
Not a solution but a work around
anyways I do not use UE5 as much anymore, only for testings, because I’m done fighting with it, specially with the sequencer… I can’t even render a movie and most assets do not respond when you ask “in-game” wich is a tragedy because UE4 sequencer is incroyable… fabulous, and so as many others I already rolled back to UE4.26 (the most stable engine version to date) and If you think about it… not fighting with UE5 issues all the time, is time worthy… bacause in the end you do want to finish your projects on time, and UE4 is a great engine that almost never crashes, with perfect FPS and great features.