Avem statement oficial de la Apple:
Quote Originally Posted by Business Insider
[...] For $15 a month, you'll be able to stream over 100 games to smartphones and tablets — but it won't be available on Apple's ubiquitous iPhone and iPad.

The reason, an Apple spokesperson said on Thursday, is because Apple isn't able to review each game that's available through Game Pass.

"The App Store was created to be a safe and trusted place for customers to discover and download apps, and a great business opportunity for all developers," an Apple spokesperson told Business Insider. "Before they go on our store, all apps are reviewed against the same set of guidelines that are intended to protect customers and provide a fair and level playing field to developers."

Because Microsoft isn't submitting each game on its streaming service to Apple's review process, the app that enables access to those games is being blocked from publishing.

"Our customers enjoy great apps and games from millions of developers, and gaming services can absolutely launch on the App Store as long as they follow the same set of guidelines applicable to all developers, including submitting games individually for review, and appearing in charts and search," Apple said in a statement to Business Insider. "In addition to the App Store, developers can choose to reach all iPhone and iPad users over the web through Safari and other browsers on the App Store."

A similar service offered by Google, named Google Stadia, has also run into roadblocks with Apple's App Store guidelines. It's available on Android phones and tablets, but not Apple devices. [...]

But without support for Apple phones and tablets, Microsoft's ambitious plan faces a major roadblock. A statement from the company pledged to continue working toward a solution.

"It's our ambition to scale cloud gaming through Xbox Game Pass available on all devices," the statement said, "but we have nothing further to share at this time regarding iOS."
Apple explains why services like Xbox Game Pass aren't on iPhone - Business Insider