Bad news: Playstation is starting to block their games from running on Proton. Playstation Overlay is blocked on Linux in Ghost of Tsushima. The same thing happened with the Concord beta.
Already learned my lesson a while back. I bought Horizon Zero Dawn for the Steam Deck. Game is listed as Steam Deck Verified. Froze every time between 10-40 secs into the opening cinematic. Fortunately, Steam is awesome and gave me a refund.
Funny thing is that in searching around for a fix, I found a forum post somewhere that described exactly my problem. Started reading replies and finally realized the poster was on a PlayStation from way back when the game was first released. Good job Sony.
I had the same deck experience but it was always really damn hot during the cutscene and inevitable hard crash. I randomly tried again after undervolting and a bunch of drg hours and the problem went away. sometimes it still freezes when doing a manual save so I have to quick save first each time. It's not a solution though because not every deck can do -30/-40/-40mv
edit: actually mine was forbidden west. I didn't play zero dawn on deck. It's probably notable that similar problems still exist in the sequel.