I second your question (I wonder whose idea was to skip this feature on the initial release?)
Is this feature available now and does it actually work?
I have spent the last few weeks trying each new build to see if gnome-remote-desktop.service would work or other approaches to GUI based remote desktop login.
I even tried what @kris was suggesting in discussion thread [Problem] Latest Build 40470 Has Issues X-Win Application Crashing
I got a little further with “dbus-run-session startplasma-wayland” in my VMware session, there were
still issues, did not seem to work as a headless (no GUI card/monitor) mode.
It seems like if the remote-desktop.service service this would be the best approach if it would work.