Kde Wayland already can do very nicely since 6 a long time ago. Even can change display mode, scaling, without programs to be killed.

I am using laptop 1600p 13.5-in 1.25x and external 1-2x depends on which monitor/TV I plug into.

Not that I use AMD GPU, so if you’re on Nvidia, I don’t know how far the process has come for wayland and nvidia.

But mix (fractional included) scaling for wayland has been a thing a long long time ago.

And unlike Windows, very not finicky