Enabling Variable Refresh Rate in Gnome 47

I tried enabling variable refresh rate in Gnome 47 on F41 by running gsettings set org.gnome.mutter experimental-features "['variable-refresh-rate']" in shell.
I’m trying all this in an Xorg session.

When I relog the session I do not have the option available on either of my VRR monitors.
Any ideas why this option would not come up?