Re: "Constantly asking me to verify I'm 18 after already doing it." "Any fix for this?"
Thank you for your question to the community! Below are a few suggestions, which may help you solve this.
(1) Wondering if your iPhone's iOS version is up-to-date ... keeping updated often sidesteps issues that arise
.You can check for updates in Settings > General > Software Updates.
(Reminder: It is always wise to back-up iPhone first, if you choose to update the iOS version)
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(2) Else: If software version is already up-to-date for your iPhone model:
You can try restarting your iPhone (deletes temporary files, re-establishes connections, may update the recent verification details or settings etc., and will often restore order iif something is not working as expected.
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(3) You might want to check the birth date listed in your Apple Account is correct.
If needed: Apple support provide an article online to assist with editing a birth date:
Update the birthday associated with an Apple Account - Apple Support
Eg: says:
"It’s important to have your correct birthday on file with your Apple Account.
It’s used in features like Family Sharing and helps provide age-appropriate experiences.
Edit the birthday on an Apple Account
You can edit your birthday in your Apple Account settings or on the web. ( https://account.apple.com/ )
To:
Edit your birthday on an iPhone or iPad
- Go to Settings > [your name].
- Tap Personal Information. You might need to sign in to your Apple Account.
- Tap your birthday to edit it.
- Update your birthday, then tap Done. "