Dear John,
Greetings! Thank you for posting in Microsoft forum.
Microsoft Forms data is stored on servers in the United States, with the exception of data for European-based tenants. The data for European-based tenants is stored on servers in Europe. Reference: Data storage for Microsoft Forms
As a tenant admin, you can view tenant specific data location information in your Microsoft 365 admin center in Settings > Org settings > Organization profile tab > Data location.
For more information about Microsoft's contractual commitments, see:
If you need any help, let us know the status. We will look forward to your reply. Stay safe and stay healthy.
Sincerely,
Neha Singh | Microsoft Community Moderator