Google's game streaming platform Stadia is now available on iOS. It is not on the App Store, however, having taken NVIDIA GeForce NOW's route as a web app onto iPhones. Therefore, users with these devices can now log into the sevice on its latest compatible hardware, should they want to.
https://www.notebookcheck.net/Google-s-Stadia-comes-to-iOS-via-Safari-web-app.510275.0.html