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.