The native app uses Flutter [0].
Disclosure: I work on Stadia, and am speaking only for myself.
[0] https://9to5google.com/2019/11/08/google-stadia-app-play-sto...
Disclosure: I work on Stadia, and am speaking only for myself.
[0] https://9to5google.com/2019/11/08/google-stadia-app-play-sto...
Because obviously then it would be irrelevant whether it's Safari, Flutter or Visual Basic.