Serial1 is not communicating with Wio Terminal Loran Chasis

I have a Wio Terminal and a LORAWAN/GPS Unit. I have been trying to get the Field Tester Capability running.

I identified the problem:
When the WIO terminal using Serial1 sends the “AT” command, no characters come back.

I replace the WIO terminal with another unit and the problem persists.

Serial1 is setup with the following commands:
while (!Serial1);

Not sure what else to try so I am reaching out for helpl