I have been using the Next app for years with several Nest Protects, cameras, and a thermostat. Everything worked fine until I migrated to Google Home yesterday. None of Nest devices are in the Google Home app; the recently acquired Google Mini Hub is. My non Nest/Google devices migrated. In addition, I now have a Home and My Home configuration.
I apologize for my late response and thank you for all of your patience while waiting for a reply. I can definitely understand how frustrating your situation must be, but I wanted to make sure that your issue was addressed. Do you still need help with this issue? I know that there's been a delay in response since you posted.
Please let me know if you need further assistance.
I’m not sure how the Nest to Google migration works or what the final configuration would look like. When I posted my comment, none of my Nest products showed up under Nest or Google Home, and still don’t under Google Home. I had “Home” and “My Home” configurations with no Nest devices. That happened with both, Google Home, and and Nest.
A few days later, I try login Nest and my Nest devices are there. Earlier this week, the Nest app brought up migrating to Google again.