Looks like you don’t have an APN. Since VoLTE uses data, that will stop calls (and data) from working.
You could try touching the three dots at the top right. That should bring up a button to reset to default.
Probably time to contact TF. I would do it by chat. It looks like the SIM was not properly activated. It may also be that it is taking time for the number port to complete between AT&T and Verizon. Did you port the number and how long ago did you transfer?
Have you checked the status of the phone in your online TF account or the TF app with WiFi?
I don’t know if Visible buggers their phones to keep them from working elsewhere. I think there may have been post about it at Reddit for Visible.