You're not giving specifics, but both KDE and Gnome have their own RDP solutions built-in.
If using another DE, just check for solutions as there are many generic ones. I'd generally be looking for RDP solutions over CNC because of Wayland compatibility.aybe NoMachine is interesting to you.
If you want to forward just single windows, look into XWayland and SSH forwarding X apps.
If you're strictly speaking about console access, then SSH.