@drianguerra07
There is no good process for, in effect, changing ownership of your cameras without first removing them from the Google Nest app or the Google Home app and then doing a factory reset. You're bypassing the security designed to protect ownership of your devices.
You could try doing a factory reset on each camera (https://support.google.com/googlenest/answer/9252162), but some older cameras don't have a factory reset pin and can only be factory reset by removing them from the Google Nest app. And sometimes, with the newer cameras, doing a factory reset without first removing them from the Google Home app still does not allow them to be re-installed.
Some posts have suggested waiting until the end of your Nest Aware subscription cycle (30 days or 60 days, depending on the subscription) before again attempting a re-install. Other posts have suggested turning the cameras off for at least 48 hours before attempting a re-install.
Are you able to review your past received emails where the sender was "Nest", or your Google Nest "home/structure", or "Nest Support", or "Google Nest" to determine the email account you used for Google Nest, so you could then attempt a password reset?
