Not exactly true. You can enable it on xorg in your AMDGPU config, and Nvidia should enable it by default (the monitor needs to support Gsync though).
By default, Wayland forces vsync, even at the cost of latency. VRR doesn’t exist in the vast majority of desktops, and requires installing a patched compositor in Gnome. Only KDE supports it by default, but only in fullscreen applications.
You can find more info on the arch wiki
Wayland may be the future, but it sure isn’t the present 😂.