Comment by MaxRegret

You probably know this already, but the problem isn't remote desktop into a logged-in session (krdp supports this) but rather logging in remotely into a headless server without a local session running. This is slightly more complicated because the login manager has to get involved and present its UI remotely. This is what that bug is tracking.

If you're happy to use Gnome with GDM as the login manager, remote headless sessions are supported already with gnome-remote-desktop: https://gitlab.gnome.org/GNOME/gnome-remote-desktop#headless....