MacRumors published a story that Apple has released the sixth betas of iOS 16 and iPadOS 16 to registered developers.

Apple Seeds Sixth Betas of iOS 16 and iPadOS 16 to Developers

Apple today seeded the sixth betas of upcoming iOS 16 and iPadOS 16 updates to developers for testing purposes, with the updates coming a week after Apple released the fifth developer betas. Registered developers can download the iOS and ‌iPadOS 16‌ profiles from the Apple Developer Center, and once installed, the betas will be available over the air. ‌iOS 16‌ introduces a revamped Lock Screen that offers a new level of personalization and customization through widgets, a notification redesign, and adjustable fonts and colors for the time. 

Apple Seeds Sixth Betas of iOS 16 and iPadOS 16 to Developers