Two-factor

2 Factor Authentication

Two-factor authentication for Apple ID

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 for two weeks. 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.

Facebook has. nothing to do with Apple's 2 Factor authentication. They are entirely separate things.

To get Facebook's code see here: link-> https://www.facebook.com/help/148233965247823/

and here: https://www.facebook.com/help/147926301947841

• You can turn off Facebook's own Two-Factor Authentication by following the steps here: click here-> Facebook Security and Login Settings.