[Rohansi]

What you are looking for is a render scale option. It is usually specified as a percentage of your display resolution but could also be combined with upscaling (DLSS, FSR, XeSS, etc.) options.

It's something that is up to the game developer to implement but it is becoming more and more common to see in games now.

[klausa]

The bizarre thing about this is that virtually all multi-platform games implement this anyway — it just works this way out of the box on consoles.

But glad to hear it’s becoming more common - I might check it out on Deck again soon.

[Rohansi]

It's basically a hard requirement on consoles because they just can't render games at full resolution.