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You should really try embracing the 40fps screen refresh rate. It’s actually half way between 30fps and 60fps by frame time so it looks a lot smoother than you’d think.

Nothing else has a screen that can actually do 40 Hz refresh so you usually can’t use 40 fps because it wouldn’t align with the screen refreshes.

40 fps unlocks a ton of games for the steam deck to run well.

Elden Ring runs great

What you need is a reverse proxy server. All the major web servers have this feature.