Welcome to the Roku Community and thanks for posting regarding notifications with the Roku Smart Home mobile app.
Within the Roku Mobile Smart Home app, have you made sure that you've enabled notifications as well as making sure that notifications are allowed within the mobile device settings itself?
Can you verify those settings are correct and get back to us? If you are still experiencing an issue, we will be able to assist you further. We look forward to hearing an update from you!
Roku Community Moderator