Passionate game collector, film enthusiast, developer & completionist. 📝 Journals & Profiles: https://linktr.ee/berny23
Yeah, window managers like KWin have to implement it as well as NVIDIA in their driver. Currently, everyone is waiting for driver support before merging the (mostly finished) feature into master.
xserver: https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/967
wayland-protocols: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/90
egl-wayland: https://github.com/NVIDIA/egl-wayland/pull/104
kwin: https://invent.kde.org/plasma/kwin/-/merge_requests/4693
mutter: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3300
nvidia driver: ???
Use NVIDIA driver 535 until 555 is released.