so can you still change your appearence? or is that coming back in a later update?
Back on the first island you start on (Or second, technicaly. The one with the Taverna) There's a thing called the "Cosmetic Shrine". Interact with that to get back to that menu you get the first time you unlock a new form. From what I can tell, there's no longer a "Portable" way to change your race/genitals/etc on the fly like there was in UE4. It's all done at that shrine.
do we have a way to unlock human form in the ue5 version? or do i have to play other forms?
Human is a variant of the Formless. So when you're choosing a form, select Formless (Farthest left form) then you'll get 2 diamonds in the center of the screen, just under the main forms. Those are the variants of the main form. In the case of the Formless, one variant is the bandaged and masked Formless, and the other is full blood Human.
Side note, those central diamonds are also where you find the other skin/fur types for the other forms as well.