The first step to opting out of the iOS 17 public beta is to open the Settings app. That’s the app with a mechanical cog wheel if you’re unfamiliar.
Open the Settings app
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Tap General
From the main Settings menu, scroll down until you find the General tab. Tap it.
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Near the top of the General settings menu, you’ll find an option for Software Updates. Tap that to continue.
Tap Software Update
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You should see a Beta Updates tab at the top of the Software Update menu. Tap it.
Tap Beta Updates
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Here, you’ll be presented with a list of beta programs your Apple ID is associated with, and the iOS 17 Public Beta should be selected by default. To opt out of the beta program, simply select None. Your iPhone will then stop getting iOS 17 public beta updates, switching back to the public releases instead.
Tap None