RCS waiting for activation

Hi, I know this problem has been posted a million times, but none of the solutions work for me. I recently switched to Xfinity mobile and my RCS Messaging is permanently stuck on "Waiting for activation."

Additionally, anytime I try to log into my Xfinity account and they send me a text to verify the login, I do not receive the text. I have received multiple emails saying "We are unable to reach you via text" even though I have confirmed the number is correct.

I have an iPhone 15 Pro. I have reset network settings, restarted my phone, toggled RCS on and off multiple times.