Google Nest Community

So my old phone, I am logged in, see three thermostats, all is well. I believe I am logged into Google on the Nest with my G suite account since I have no other gmail accounts. So, my old phone is logged in with my G suite account, but, when I try to...

I bought a used Nest Thermostat off ebay, it works fine but I cannot get it to recognize in the Google Home app - the app asks to either scan the QR code or enter the six digit set up code, neither are on the device. A factory reset would not change ...