A few minutes ago Apple now made public betas for both iOS 11.2.5 and tvOS 11.2.5 available for download for public testers where they can get it from Apple’s Beta Software Program.
The watchOS 4.2.2 beta, which was also seeded to Apple’s registered developers yesterday afternoon, is not available as part of the public beta program.
Members of Apple’s beta-testing program shall get their iOS 11.2.5 public beta over-the-air after installing a proper Apple configuration profile on their iPhone or iPad. As for the tvOS 11.2.5 public beta, you must first enroll your Apple TV at beta.apple.com.
Then, go to Settings → System → Software Updates and toggle on the Get Public Beta Updates option before you can download and install the latest tvOS beta software.
