I use Firefox and Rumble so I don’t care what YouTube does.

Really bad sign.

manjaro

I am currently on Manjaro. It comes pre-installed with Nvidia drivers. My laptop is a Razer Blade 18 2023 version.

It has a built in 240hz monitor. I am running X and it can be set to 240hz no problem. I also play D4 all the time and have it capped at 150 fps. It works absolutely no issues.

I also have a desktop with a 3090 and manjaro and an Asus pgq42u. It runs at 120hz no problem.

I think it is either a config issue on your end, or a distro issue.

Just use X. It has better support currently and just less rough edges. Wayland is getting better but it still needs a few more releases with Nvidia’s help it will improve.

Basically need to do nothing.