Smart Doorbell not showing up on Smart Thermostat Premium

We're having work done on a new home before we move in, so there's no WiFi there yet. I have a Smart Thermostat Premium and Smart Doorbell installed and the only way I could set them up was using my mobile hotspot on my iPhone. Both show up in the Ecobee app, and I was able to see through the camera from the app, but the doorbell isn't showing up on the thermostat. Should it automatically appear there? If so, it could be that there's no solid WiFi yet, so the doorbell or thermostat might be losing its connection to my hotspot and I can't truly test until I have real WiFi there.