tvOS apps: Apple TV running tvOS 13 or later.macOS apps: Mac running macOS 12 or later.App Clips require iOS 14 or iPadOS 14, or later.
iOS or iPadOS apps: iPhone, iPad, or iPod touch running iOS 13 or iPadOS 13 or later.
If you’re a member of the developer’s team, the developer can give you access to all builds or certain builds. You’ll be able to access the builds that the developer makes available to you. To test beta versions of apps and App Clips using TestFlight, you’ll need to accept an email or public link invitation from the developer and have a device that you can use to test.