Multiple issues with mobile RTX 4060 and NVIDIA drivers 550.78

Yes. That’s why you’re lucky, the intel ones are complete wrecks. It also doesn’t matter how much you paid, the legion series are classic “Works With Windows” systems, even if you paid $3k.

This was always the issue with nvidia-only notebooks, the nvidia driver provides scaled resolutions only through randr 1.1
xrandr --q1 shows them. Quite unusable. Don’t know if Wayland handles this better.

Did you check if it even outputs at 60Hz, eg using glxgears?

It’s like something like that, I suspect:
https://forums.developer.nvidia.com/t/gsync-screen-of-the-alienware-m18-r2-is-not-detected/283922/4?u=generix
Don’t know why it rejects the 60Hz as minimum refresh rate. Should work but doesn’t.

Please run nvidia-bug-report.sh as root and attach the resulting nvidia-bug-report.log.gz file to your post.