First, sign in with apple, I saw 2 options, first is Share email, it's original email, second is Hide email, it's an email generated by Apple. I choose option 2, and I go to iCloud setting in iPhone settings > Click on ID Apple, iCloud+ ... (first option) > iCloud > Hide My Email > Choose the email that are using > Deactivate email address and delete that email. I go to sign in with apple again, it does not show the option Hide email.
How to enable this option again?