Thanks for the help, @Frustratedddd.
We hear you, @Jimrichardson. We're always looking for ways to improve our products and services, and we'd appreciate it if you could send us feedback. The Nest thermostats can only be added via the Nest app or Google Home app, and you need to be physically present with the devices themselves to ensure the correct HVAC system configuration.
Please have a look at this article and let us know if you need more help.
I wanted to check in and see if you managed to see Mark's post. Please let me know if you have any questions from here. I would be happy to assist, and make sure you are good to go.