MacRumors published a story that Apple has released the fifth betas of iOS and iPadOS 15 to registered developers.

Apple Seeds Fifth Betas of iOS and iPadOS 15 to Developers

Apple today seeded the fifth betas of iOS and iPadOS 15 to developers for testing purposes, with the updates coming two weeks after Apple released the fourth betas.

Registered developers can download the profile for the iOS and iPadOS betas from the Apple Developer Center, and once the profile is installed, beta updates will be available over the air.

  Apple Seeds Fifth Betas of iOS and iPadOS 15 to Developers