https://wccftech.com/ios-15-and-ipados-15-official-released-date-announced-by-apple/

Apple has officially announced the release date of iOS 15 and iPadOS 15 final updates for iPhone and iPad.

We have been treated to a boatload of betas over the past few months. Today, Apple brings us closer to the final build of iOS 15 and iPadOS 15 with the release of the RC build for developers and public beta testers.