Hi robs1,
If the Account security section is blank, it could be due to a display issue. I recommend clearing your browser's cache and cookies or trying a different browser to access your profile.
You can now set up multiple two-factor authentication (2FA) methods. This means you can register both your email and mobile as options for receiving 2FA codes. Once set up, you'll no longer need to switch between methods manually. You can use whichever option is most convenient at the time. For more details on managing your 2FA settings, you can refer to this link: Setting up additional two-factor authentication (2FA) methods.
Regards,
Sai