Resetting passwords for secondary email accounts option not available

I have been a comcast customer for 19 years.

I have one primary account with 3 additional email accounts for family members, a total of 4 email accounts

I moved to a location that does not offer xfinity/comcast, when I changed my service the CSA assured me my email accounts would continue to work

Now with comcast/xfinity/merge and MFA forcing me to update passwords, there is no longer a comcast.net email login to do it and you are forced through xfinity.com

When I go to xfinity.com to reset one of the family member accounts, it tells me my account is inactive (see previous point), but it no longer gives me the option to 'manage' the other 3 email addresses.

I called 1-800-XFINITY, spent two hours and got transfered 3 times then they hung up on me

The CSA were incompetent and did not understand even what I was asking about.

I called back once again and they stated that Xfinity changed their policy and comcast.net emails will no longer work (which is false because my comcast.net email is working).  I asked if they had backup services, or any server rules where I can redirect incomming emails and again they didn't know what I was asking

So the question is, how can family members continue to use their comcast.net emails that they have been using now for 24 years and reset their passwords.?