Been doing quite a bit of in-home streaming from PC to Steam Deck lately, and decided to give Chiaki4Deck a try for PS5 to Steam Deck in-home streaming. Works like a charm; great graphics (including HDR), touchpad and haptics support, and QoL stuff like sleeping your PS5 when exiting the Steam Deck’s stream session.
Here is the guide I used: https://streetpea.github.io/chiaki4deck/setup/configuration/
Chiaki has legit been about 90% of my steam deck time. Anything newer or already in my PS+ collection I just stream. My deck is just for retro games and PC/Xbox gems that are playable on the system.