Go to OSX Daily to read How to Leave iOS 15 Beta & iPadOS 15 Beta Programs
Many of the more casual users who beta tested iOS 15 and iPadOS 15 on their iPhone and iPad may wish to remove the beta updates from their devices, and leave the beta program. And now that the final versions of iOS 15 and iPadOS 15 are available, perhaps you’re no longer interested in the new beta builds of 15.1 etc.
By leaving the iOS/iPadOS beta program, you will no longer receive beta updates on that device, instead you’ll get the final stable versions that the general public gets.
So, want to leave the iOS/iPadOS 15 beta program and stop getting the beta…
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