Anyone with AT&T getting notifications re: wifi calling error?

I get those all the time when I was a customer. I simply turned it off and have not been using it since the signal was ok. I'm on TMO now and have not used wifi calling either.
I am on TMO and I have been using WiFi calling for a long time now and I have never had any issues with it. Not just on my Fold 7, but on my S23U and my wife's S22U, never an issue.