I’m using Wayland, which is the Fedora 35 default. I considered X11 but the experience isn’t quite as smooth for the day-to-day stuff in Fedora and I just didn’t want to work around odd quirks if I could avoid it.
I tried the GNOME desktop sharing, but as far as I could see you need to be already logged in to jump in. Besides that it worked OK, though I recall screen resolution being a bit strange, like having 1024x768 or similar which is really quite small for GNOME’s big windows. I never looked into whether these issues I found were configurable, but they don’t seem to be easily accessible options if they are.
The issue I ran into was with multiple monitors. Stretching a VNC window to span multiple monitors is doable, but the window manager in the VNC session won’t know where the borders are and will treat it as one giant monitor. Using one big monitor is a workaround.
With RDP on Windows, if I stay logged in with programs running and walk away from my computer and remote in to it, I will get the same session I left open. Unlike VNC, this session will resize everything to fit my client's preferences because it isn't just passing screenshots or a video feed of the desktop back.
GNOME has desktop sharing built-in. I believe it is VNC based, but maybe you'll have better luck with something built into GNOME. SSH forwarding works fine for single apps, but for a true remote X desktop, I've usually configured XDMCP in the past. If you use Chrome, there is also Chrome Remote Desktop (remotedesktop.google.com). It worked fairly well when I used it last, but that was a while ago.