Since porting my iPhone 11 over from Verizon to AT&T, I have not been able to RECEIVE text messages from Verizon Android users

Since porting my iPhone 11 over from Verizon to AT&T, I have not been able to RECEIVE text messages from Verizon Android users.

  I've tried:

- Resetting network settings

- Powering off/on phone

- Hard re-set - erased ALL content and settings

- Deleting contact with Verizon Androids and making new contacts for them

- Deleting old text conversations

- Deleting any group chats with Verizon Android users

- Replaced SIM card in AT&T store (twice)

- Software is updated to IOS 13.6

- Apple Support - highest level says it is a problem with AT&T not provisioning my phone properly when it was ported over        from Verizon to AT&T.  Apple blames AT&T

- AT&T level 3 tech support cannot locate any problems at all with software.  Says it is not a provision problem on their end.        AT&T blames Apple

PLEASE HELP!!!!!!!!!!!