https://wccftech.com/beta-3-of-ios-14-7-macos-11-5-watchos-7-6-tvos-14-7-now-available/

Apple has just released the third betas of iOS 14.7, iPadOS 14.7, macOS 11.5, watchOS 7.6 and tvOS 14.7 to registered developers.

You can expect the same updates to become available to public beta testers as well. But for now, it is available to those enrolled in the Apple Developer Program.