I had to do a lot of digging until I could find that putting -w 1920 -h 1080 into certain steam games’ launch arguments could make text readable on gmod on my FW 16 screen. Not much else to say but I had to do a lot of digging and it should be in the bazzite documentation.
Then create a PR for the docs 
The problem with Linux distros is, there are many moving parts to Linux and not all of them are made by the same party.
The command you mention is a part of gamescope, which is a compositor developed by valve. So the documentation for it can be found in gamescope’s GitHub page: GitHub - ValveSoftware/gamescope: SteamOS session compositing window manager
It is understandable to think that Bazzite is responsible for everything going on in, well, Bazzite but they are not. I had a problem with my Razer mouse for example, but the ones responsible for it are people who created the openrazer daemon so I had to ask them for help.
That is one issue with open source software. A lot of people can contribute to different part of an open source software so it might be confusing to know who to ask for help with a problem.
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