Last time I had a quick look, zink did seem far from being finished, I mean very far away.
The main issues for xwayland+zink are the middle ground applications: those which are x11/vulkan3D without wayland support, if I am not mistaken, like shadow of the tombraider, metro exodus games, etc (even though I would not play anymore those games).
ohohoh... I am going to ask if valheim has a working/tested wayland backend while I am thinking about it.