Also if it's of interest, our team building a whole platform-as-a-service around WASM/WebGL/WebGPU to enable game developers to distribute their games and 3D applications directly users online, in the browser. Here's a blog post from last year that we did, which contains links to several more demos:

https://theimmersiveweb.com/blog

Thank you! And yes it is possible to use a PS5 controller (or any controller, for that matter) as the browser will automatically detect it, and use the HTML5 Gamepad API.