Sony occasionally adds titles to their cloud streaming catalog for PC, though Astro's Playroom is currently not one of them. Alternative Games for PC
If you already own a PS5, you can stream the game from your console to your PC using the official PS Remote Play app. The game still runs on the PS5, but you view and control it on your computer screen. Sony occasionally adds titles to their cloud streaming
Sony has not released Astro's Playroom on Windows or any other PC platform [1.1]. Sony has not released Astro's Playroom on Windows
It sounds like you're looking for a way to play on your PC for free. Sony occasionally adds titles to their cloud streaming
Because of this, there are two main things you should know regarding a "PC version":
If you love the vibe of Astro's Playroom —a bright, polished 3D platformer—there are some fantastic alternatives available natively on PC (via Steam or Epic Games Store):