Apple:
Our customers enjoy great apps and games from millions of designers, and gaming services can absolutely release on the App Store as long as they follow the very same set of guidelines applicable to all developers, including submitting video games separately for evaluation, and appearing in charts and search. In addition to the App Store, designers can select to reach all iPhone and iPad users over the web through Safari and other internet browsers on the App Store.
Google provided no comment about Stadia support through iOS, but a Microsoft representative sent out over the list below response.
Microsoft:
Our testing duration for the Project xCloud preview app for iOS has actually ended. We do not have a course to bring our vision of cloud gaming with Xbox Game Pass Ultimate to gamers on iOS by means of the Apple App Store. Apple stands alone as the only general purpose platform to deny customers from cloud gaming and game membership services like Xbox Game Pass. And it regularly treats gaming apps in a different way, using more lax guidelines to non-gaming apps even when they include interactive material. All games offered in the Xbox Game Pass catalog are ranked for content by independent industry scores bodies such as the ESRB and regional equivalents. We are dedicated to discovering a path to bring cloud gaming with Xbox Game Pass Ultimate to the iOS platform. We think that the consumer ought to be at the heart of the gaming experience and players inform us they wish to play, link and share anywhere, no matter where they are. We agree.
Apple: iOS games need individual review, which blocks cloud gaming apps – Engadget
