The Team is now created and next, you can view its landing page. This will permanently add Teams to your existing Office 365 group. Select the group for which you wish to create a Team. Next, you’ll be presented with a list of your existing Office 365 groups. From that, choose Create Team and then select Create From… You’ll be presented with Teams or Office 365 group, there you must select Office 365 group.
Select Join or Create a Team you’ll be presented with two options, Create Team or Join Team with a code. This is done from the Microsoft Teams app. Or put it another way, you can create a Team from an existing Office 365 group.