I have WiFi calling enabled as I have for number of year on my iPhone, iPad, and Mac. It works on all devices if the iPhone is on the WiFi network. If I turn WiFi off on the iPhone then the iPad and Mac both give the message “WiFi calling, not available on this WiFi network”. I am trying to determine if this is a bug, as it worked during the later beta stages of iOS 26, but hasn’t since then and I am currently on iOS 26.1 and it still gives this message. I am also on AT&T.