The Google Home App or voice control occurs when both services are linked in the cloud. If you are experiencing issues with communication, discovering new devices, or if you will no longer be using the Google Home service you can easily unlink the My Leviton Service from Google Home.
Choose the + in the upper left corner:
From the menu that appears choose "Set Up Device":
In the Set Up a Device menu choose "Works With Google":
All of the connected services are shown. Choose "Leviton"
From the pop-up choose "Unlink account"