I don't know if it works on the stock screen as I don't have a unit to test on. But I will say that pstate finally works on LCD Decks as of the latest UEFI!
Valve worked on it alongside AMD specifically for the Deck...only for it to never be implemented on the actual device. 131 fixed it on LCD Decks, but it still doesn't work in SteamOS, only Bazzite. It's meant to be more efficient (so longer battery life) and more reactive.
Figured it out. Though am curious. I'm trying to launch fate grand order and it seems to say it can't reach the servers. Any reason why this might be happening and how I can fix it? Waydroid can connect to the Internet no problem