Apple today has released iOS 13 Beta 3 to Developers. According to release notes that was just released on the Apple Developer documentation page, the beta is currently not available for iPhone 7 and iPhone 7 Plus.
- “iOS 13 beta 3 isn’t available for iPhone 7 or iPhone 7 Plus. (52363318)”
It is currently unknown when the third beta will be available for the iPhone 7 and iPhone 7 Plus, but we will keep you updated if Apple releases it.