Hi @Arno Rohwedder
To restore a deleted team in the Teams admin center, do the following:
1.Go to the Teams Admin center > Teams > Manage teams.
2.Expand Actions menu on the top right corner, click View deleted teams.
3.Select the team that you want to restore from the list, and then click Restore. You can also select multiple teams and restore them.
Please note that it might take some time for the team to appear in the Manage Teams list. Select Refresh to refresh the list.
You can also try to restore in M365 admin center:
If you are a global administrator or a groups administrator, you can restore a deleted group in the Microsoft 365 admin center:
1.Go to the admin center.
2.Expand Groups, and then click Deleted groups.
3.Select the group that you want to restore, and then click Restore group.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.