To determine where your Microsoft 365 tenant is storing its data, you can sign-in to the Microsoft 365 portal and check the location as follows.

https://portal.office.com
Admin –> Home –> Settings –> Org settings –> Organization profile

The data location for this tenant is Germany.


Links

Where your Microsoft 365 customer data is stored
https://learn.microsoft.com/en-us/microsoft-365/enterprise/o365-data-locations?view=o365-worldwide