Created attachment 412682 [details]
See screenshot. It's also flipped, but that's a separate issue, scaling was there before it and I only reported it now.
Since AC mode seems to be always enavled in GTK4 builds:
Wayland, Fedora 33, Mesa Intel® UHD Graphics (CML GT2)
Created attachment 416096 [details]
Committed r270741: <https://trac.webkit.org/changeset/270741>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 416096 [details].