Thanks for posting here in the community. Let's go ahead and see what we can do here. To confirm, do you have the 2nd gen of Nest Doorbell or the battery type? The new Nest Cameras are only available to the Google Home app and it can't be set up or controlled via the Nest app. If you have other questions and concerns, feel free to let me know.
I just wanted to follow up to see if you still need our help. Please let us know as we would be happy to answer any questions you may have.
I appreciate the help, Emerson.