Not sure it will do anything to hurt Wayland. The app will just run in XWayland which is mostly impossible to tell between a native Wayland app for users.
I might not be up to date on this, but does fractional scaling work at all on Linux under any setup? Last I checked GTK just flat out didn't support it or something.
KDE supports fractional scaling. GTK doesn't and as a result neither does GNOME. There's hacks in gnome to work around this by faking it with downscaled integer scaling (render at 2x, squash into 1.5x) but it never provided a good experience for me.
