Teams not appearing when SDS imported teachers/students logon

Hi, I have used sample CSV from https://github.com/OfficeDev/O365-EDU-Tools/tree/master/CSV%20Samples/UK%20Format/25%20Users and imported via SDS.

After importing the CSV, I can see O365 accounts, O365 groups & Teams has been created. Teams also has students as the members and teacher as the owner. However when teacher logon to the Teams, all they can see is "Create a team" or "Join a team with code". And same for the students as well. Have I missed anything, any help would be much appreciated, thank you.

Screenshot for SDS profile