Please continue this discussion in this thread: Nest Camera No longer Triggering
I have an old Nest Doorbell, an Google Nest Hub Max, and a Google Nest Camera (2021) connected to the power, and I only get CameraMotion, CameraPerson, and CameraSound for the old Nest Doorbell.
Doing some debug at Cloud Console, I could find that there are no events being published for the Nest Hub Max and Google Nest Camera (2021), however, I get events for the Nest Doorbell and a Nest Thermostat. Given that I already re-authorized all the devices I can only deduct that the publisher just isn't working (a google side issue).
I hope someone from Google API team checking this StackOverflow that could help me.