Can't speak for KDE but if you end up needing a workaround you could try installing and configuring xrdp (despite the name it works with Wayland as well as X) - just make sure to configure it listening on a different port vs KDE's RDP server (or just keep KDE's disabled, I guess).
I'm on GNOME and have both GNOME RDP and xrdp but in practice I usually just use xrdp.