

Seems like, to have the exact same thing, you need to is set this up.
https://github.com/Grimish-ng/steam-gamescope-guide
But idk what my brain really wants. It still feels like the Steam Deck has less issues with ganescope than some people on their hardware. Maybe I also have read that stuttering is solved when using a tty instead of Desktop to put Gamescope on.
I really dont know if you used Gamescope on your Desktop or not. But I also experienced wrong keyboard mappings and inability.
Additionally, on a Desktop, you will have some Latency added but its not noticable.
If thats your fantasy.
I also added that my main source were other commentd saying similar things. That should have been enough. Its not nearly obvious except you have zero empathy for other perspectives on the world except your own biased view.