X11 can't do different hz on different screens. If you have a dual screen setup where one screen is 165 hz and the other is 60 you're SOL.

Works fine for me with 144/120 with the second as 60.

X11 can't fix climate change.

	▲	hedora 3 minutes ago \| parent [-]
		You joke, but the wayland protocol leaves this up to the compositor. Nothing in the protocol prevents your desktop environment from doing this.