You probably know this already, but X11 hasn't been dropped completely. You can still install what you need from the distros, and then the X11 option will be present and correct in SDDM.
sudo dnf install kwin-x11 plasma-workspace-x11
You probably know this already, but X11 hasn't been dropped completely. You can still install what you need from the distros, and then the X11 option will be present and correct in SDDM.
sudo dnf install kwin-x11 plasma-workspace-x11