Have here some (remote) installs only reachable via VNC (and ssh) and woud like to test Wayland. Is there a config file I could change to switch to Wayland?
Afterwards I assume I would have to adapt the VNC config to be able to start up the remote desktop (via ssh).
In the Wayland world, each compositor has to implement its own remote desktop solution. KDE Plasma 6 currently only provides RDP (via KRdp) for Wayland-based desktop sharing. Not designed for headless operation as such - it needs an active local session running.
Are you just wanting to do remote admin as such? If so, Cockpit might meet your needs?