Does he make these models himself? If not anyone know where i could download them?
Artists don't really make models they modify existing ones.
I believe ZXC uses NYL's BG3 models as a base (which themselves are modifications of other models) for a handful of characters, stitches said characters heads from other sources to them, and then modifies textures.
I believe he's also used NYL's Overwatch models whole (which again, are mods of models made elsewhere) and modifies them too.
He's also used a (modded) model by PharaBestGirl of Phara once as far as I can remember and of course, he modded the NYL2 penis (which is a mod of Urgarulga's penis model) to it, and then modded that further.
He then also uses AI tech to further tweak images and uploads them as alts.
Essentially, use whatever you find and mod it, it doesn't take long at all but not many people learn how to do it.