With my experience with both I can say there is pretty much no difference in terms of gaming but I will say it is easier to tweak stuff and to get the latest drivers on arch compared to Debian.

It’s definitely usable now but like other people have said xwayland is still a bit flakey and apps that don’t use pipewire or wayland for screen casting won’t work

It’s rare to see a header for those on cosumer motherboard but most nics and hbas have a connector for a led that it can also be used for.