Based on MATE Desktop 1.26 Released with Initial Wayland Support + More - OMG! Ubuntu! there is (some) Wayland support now. I have a portrait mode screen tearing issue with Intel UHD Graphics 630. I tried recommended elsewhere
Section "Device" Identifier "Intel Graphics" Driver "intel" Option "TearFree" "true" EndSection
which indeed fixed the tearing, but also disabled SPDIF audio somehow. Another recommendation is to dump X11 and use Wayland, but when I go to MATE Tweak, the only option for Window Manager I see is Marco.
The tearing is well visible in Chrome and VS Code. I didn't notice it with other applications. Any advice how to fix it or how to get Wayland working?