Well yeah, the Steam Deck is all about games.

X86 on ARM.

It also has a Windows artifact and in any case one could still compare it to the official software, no matter where this runs. I’m not happy with the Sony app so this might be a better alternative.

Is it better than the official streaming software?

The quests are compatible with Linux as Steam supports streaming to them natively.

While the documentation does list quite a few useful details about the specs of the display, the PWM frequency is unfortunately not mentioned. A reliable measurement can only be done with a specialized device like an Opple Light Master. Here is some more research about the PWM flicker on the Steam Deck OLED: https://old.reddit.com/r/SteamDeck/comments/1882kys/analysis_of_the_pwmflickervisual_fatigue_of_the/

What is the PWM frequency with DeckSight? I’m pretty sensitive to that and my regular OLED model sadly strains my eyes within an hour. Maybe something like this could be a better alternative for me.