Remove Beta

These are the instructions:--> How to uninstall iOS or iPadOS beta software

For any further questions/doubts about this matter, please use the Feedback Assistant provided by Apple Beta Software Program or, if you are a developer, join Apple Developer Forums here:--> https://developer.apple.com/forums/

Regards

Giulio

Click here and follow the instructions. This will only work during the beta period.

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This may also help: Apple Beta — Unenroll Your Devices