Atlassian Cloud/OnDemand App no longer listed in Google Apps administration
You are not able to find the Atlassian Cloud/OnDemand App icon from your Google Domain associated to an Atlassian Cloud site and it is not possible to be redirected to your Cloud instance directly.
On April 20, Google shut down APIs that were used for the Cloud/OnDemand App. With the deprecation of the API, the app is no longer available on Google.
Your Google Apps integration should still be active and operational without the app icon on Google's side.
Access your Cloud instance directly from the instance URL -
https://<instance_name>.atlassian.net/. You may login using Google Apps: