Team not visible in Teams admin centre or from get-Team powershell by owner and global admin.

I have been working with microsoft to resolve this issue since it was posted and now have a resolution.  We were able to MS Graph to make a API call to Reconnect the Team to the Group.  

URL-> https://developer.microsoft.com/en-us/graph/graph-explorer

groupid below replaced from the Admin->Identify -> Group ->All Groups-> (Group disconnected from Team)-> GroupID that matches the team or ExternalDirectoryObjectId from exchangeonline of the team email address.

API Rest Call PATCH https://graph.microsoft.com/v1.0/groups/{groupid}   

Request Body
{"resourceProvisioningOptions": ["Team"]}

Please use this at your on risk.  I did this under supervision of microsoft support and engineering after weeks of research.