Steam Deck 2 delay was right choice for Valve as mid-generation refresh would fare better
(www.notebookcheck.net)
I was going to make that point, but I don't think the steam deck gets quite the same benefit on optimization. It could, but it needs a lot more volume before devs seriously target it.
More because they can just sell it on PC and a lot of us will tolerate it pushing the hardware past its limit anyways. A PS5 version has an explicit level of responsibility that the Steam Deck doesn't, unless they're actively advertising it. (That's not deck verified, because developers don't decide that.)