why can i not turn off 2 factor verification on my iphone

chickeringrd wrote:

why can i not turn off 2 factor verification on my iphone

You only have two weeks from initial enrollment in 2FA in which you can opt out. If it has been more than two weeks, you can’t unenroll.

Can I turn off two-factor authentication after I’ve turned it on?

If you already use two-factor authentication, you can no longer turn it off. Certain features in the latest versions of iOS and macOS require this extra level of security, which is designed to protect your information. If you recently updated your account, you can unenroll within two weeks of enrollment. Just open your enrollment confirmation email and click the link to return to your previous security settings. Keep in mind, this makes your account less secure and means that you can't use features that require higher security.

Two-factor authentication for Apple ID - Apple Support

If you have had it for more than 2 weeks, you can’t delete it.