In addition to adding the feature to your TV or Chromecast, you'll also need to have a Home set up in the Google Home app. That should be the same Home that your Google TV is part of; if there isn't a Home set up, you won't get the Home Panel notification.

The latest update began rolling out during the past 24 to 48 hours, and reports indicate users are using the Home Panel feature on discontinued Chromecast devices and Google TV sets, including Hisense TVs.

Google is widely rolling out the Home Panel to Chromecast with Google TV device, bringing a Google TV Streamer feature to the dongle.