I've been using Google Home Preview for a week. I turned on presence detection. In the feed I also see that my smartphone is recognized as being present or absent, but the status does not change automatically in the Home app. Thus, the cams are not automatically activated or deactivated. Furthermore, I can't find a way to configure the processes "At home" and "Away" anywhere. I can't find where to set which cameras should be activated and which shouldn't. I'm really at a loss.
Thanks for posting here in the Google Nest Community and sorry for the delayed response.
I’m glad your issue is resolved now. I’ll keep this thread open for 1 more day. If you need further help, let me know.