I did not find a way to be notified when a release in the Google Play console is approved by Google team (and then I manually publish it the store) like "google has reviewed the app and it is now ready to publish".
It's annoying to visit the console every hour to know if the review process of my update is approved.
I already searched a solution with CI/CD like Bitrise or even tried to scrape the Google Play Console but no success.
Update: as of October 2021, the "Play console" app is now sending notification when your pending release is approved by Google and ready to be published in the store (even when manual publishing is enabled)