Thanks for posting here in the community. Let's go ahead and see our options here to help you. To confirm, is the Airplane or do not disturb mode turned off or on? Have you tried it with a different mobile device? Is this issue constant or intermittent?
Give these steps a try:
Looking forward to your response.
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.
Thank you so much. It is working properly now. I had been using the Google Home app since I have other Google products but I reinstalled the Nest app and it is notifying me as intended.
Cool, we're glad to hear that! As we got our resolution here, I'm going to mark this thread as complete. I'll be locking this thread if we won't hear back from you again in 24 hours. Should that happen, feel free to create a new one if you have more questions or have other concerns in the future.