I've found GamingOnLinux statistics [1]. Mostly X11, wayland 7%. But look at the other data:

* Both Ubuntu and Arch based distro 40%

* Manjaro helped a lot 15%

* Both AMD and Intel 50%

* AMD GPU 40% and rising

* Open source GPU driver 43% (almost all of it AMD)

* 10% own VR Headset

[1] https://www.gamingonlinux.com/index.php?module=statistics&vi...