[SSLy]

https://github.com/ValveSoftware/gamescope is the one actually competent wayland WM.

[p_l]

Noticeably it doesn't export Wayland to applications running underneath unless you enable an experimental flag, and half the reason for its existence is that it can be entirely bypassed by related Vulkan layer extension.

[Gormo]

And it works great as a standalone X11 server too.