I am trying to add extra security with security keys
iPhone 12, iOS 16
See the following Apple Support article for information on adding security keys for your Apple ID: About Security Keys for Apple ID - Apple Support
Note that the security keys provide security for your Apple ID but otherwise don't increase protection for your iPhone.
Perhaps to outline and propose what might be the cause of your concern
may help to address this issue? I've several bookmarked pages in browser
some differ due to varying depth. ~ And as a Volunteer in ASC discussions
this is a matter of personal time & resources; of which mine are few.
If you think your Apple ID has been compromised - Apple Support
//support.apple.com/en-us/HT204145
Security and your Apple ID - Apple Support
//support.apple.com/en-us/HT201303
Keychains | Apple Developer Documentation
//developer.apple.com/documentation/security/keychain_services/keychains
Change your Apple ID security questions - Apple Support
//support.apple.com/en-us/HT201363
About Rapid Security Responses for iOS, iPadOS, and macOS - Apple Support
//support.apple.com/en-us/102657
About Security Keys for Apple ID - Apple Support
//support.apple.com/en-us/HT213154
[These are among others; please discover the nature you wish to explore.]
Help with security and support for my iphone
