No. Even via Windows dual-boot, the Steam Deck lacks the power and API support to emulate PS5 games.
The primary reason Astro’s Playroom is not on PC is its reliance on the DualSense controller. The game is built entirely around "haptic feedback" and "adaptive triggers." Players can "feel" the difference between walking on sand, metal, or grass through the controller’s vibrations. While the DualSense can be used on a PC, Astro’s Playroom is optimized specifically for the PS5’s internal architecture. It uses the console's ultra-high-speed SSD to eliminate load times, creating a seamless journey through the "internal components" of the console, which serve as the game’s levels. Astro Playroom Pc Download