SMS/MMS over wifi calling not sending or receiving messages

Here it is March 29, 2024.  I have been having this problem since the first of the year.  I have read numerous posts/forums about this same issue, none having any solution.  Probably wishful thinking, but has anything new come up to help remedy this problem?  I have never had an issue with texting over wifi calling until the 1st of this year?  Once I get cellular connection or go into town, I may receive most or all of the messages I have missed at home.  Phone works great in 5G LTE area of service.  I'm at my wits end.  Have gone back and forth with Xfinity and AT&T pointing fingers at each other.  No fixes or suggestions from either.  Receive AT&T error message #332.