It’s a super common use case to have a primary monitor with high refresh rate and VRR, plus one or two cheaper monitors that don’t. Xorg doesn’t really support that at all without some really hokey tricks that severely impede usability.
I wish Wayland shills would stop spreading this lie. It literally just works. In fact, I’m doing it now on my laptop with a 144Hz 1080p monitor, and an external 60Hz 1440p monitor connected with Thunderbolt, with a dual-GPU setup (iGPU + nVidia, which Wayland doesn’t properly support, yet this is nVidia’s fault somehow even though Wayland compositors run entirely in user space, without interacting with the driver directly).