How to create email user account without providing a unique phone or external email ?

I want to use the 8 email accounts with my account - but I have 1 phone and no external email accounts- 

As of March or April 2021 - I am no longer able to create email accounts without a unique phone or email.  When entering an external email - the Xfinity ID is set to the external email account.  This makes NO sense - 

How can I use the 8 email addresses with my account without creating a batch of fake GMAIL accounts ?