If you got any programming skills, Lemmy’s code is open source and improvements to these expensive calls (or just any call) would most likely help the server. I’m also sure moderation tools would probably make their job easier and just improvements to the platform as a whole would probably help (more users, more possible donations, especially if it gets closer to platforms like reddit)
But without any technical skills like that, probably just helping communicate stuff like this, like if someone’s complaining, explaining this, is probably the best you can do (and it ain’t much)
Yuzu is an interesting idea, I haven’t thought of that, but last I checked a few months ago, it was still not working, and I heard using wine to run the windows version can get you banned so I never tested it.
On my steam deck I’ve been using Xbox cloud gaming (free if you’re willing to wait) or Amazon Luna (if you have prime), and they work decently well, much better than “not running at all”.