SUMMARY GNOME got it just recently. And Windows has had it since like Windows XP days. https://www.phoronix.com/news/GNOME-RDP-Remote-Login On X11 we had xrdp but moving towards Wayland currently there's no other solution on KDE Plasma for graphical remote login. There is KRDP few months ago: https://planet.kde.org/arjen-hiemstra-2023-08-08-remote-desktop-using-the-rdp-protocol-for-plasma-wayland/ but it runs under user session (instead of as a system service) and, at its current state, clearly doesn't support remote login the way GNOME (upcoming) and Windows does.
This bug is opened before #481912, however since #481912 has more details, closing this in favor of #481912. *** This bug has been marked as a duplicate of bug 481912 ***