The patches exist for Wayland/Xwayland but the Compositor itself has to be patched as well for it to completely work. KDE does not have its fix for explicit sync merged in yet so its not patched as of Plasma 6.0.1. It did make things slightly better but all it did was make the flickering less frequent, but its still there.
Yeah. I have a multi-monitor VRR setup as well and happened to have a 3090 and not being able to take advantage of Wayland really sucks. And its not like Xorg is any good in that department either so you’re just stuck between a rock and a hard place until explicit sync is in
Lets see what will happen first- me getting a 7900xtx or this protocol being merged
Better, but still shit. The main holdup right now to what I see is wayland-protocols and the WMs adding Explicit Sync support as the proprietary driver does not have implicit sync support. Its part of a larger move for the graphics stack to move to explicit sync:
https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/90
Once this is in, the flickering issues will be solved and NVIDIA wayland being a daily driver in most situations