What camera do you have? The newer Google Nest cameras and doorbells released starting in the autumn of 2021 work ONLY in the Google Home app and NOT in the Google Nest app or on the home.nest.com website.
@MplsCustomer, thanks for the help.
@Steph1974b, thanks for posting, I know how it feels when something isn’t working as it should, let’s get this resolved: A few things: just like how MplsCustomer asked, which Nest camera? Do you have multiple home's in your Nest app? Have you been able to see this camera before?
Looking forward for your response.