`azd provision` fails with an avoidable error

1. Created a brand new Azure account.
2. Upgraded my subscription from "Free Trial" to "Pay-as-you-go".
3. azd init - created the environment
4. azd provision - supplied inputs as requested.
5. Deployment failed with this error -

ERROR: deployment failed: error deploying infrastructure: validating deployment to subscription:

Validation Error Details:
InvalidTemplateDeployment: The template deployment 'azurechat-lab-1759362343' is not valid according to the validation procedure. The tracking id is 'b64d1897-199c-4a71-abbb-0277f9e05e65'. See inner errors for details.
ValidationForResourceFailed: Validation failed for a resource. Check 'Error.Details[0]' for more information.
SubscriptionIsOverQuotaForSku: Quota exceeded for : 0 VMs allowed, 1 VMs requested.. Try selecting different region or SKU.

Request for change to the provision script here - Why allow me to pick a region that it knows is invalid for a resource it knows this deployment will provision?

Start by tracing the azd provision flow and the infrastructure deployment validation that selects a region and SKU. Reproduce the failure with the reported subscription and deployment error, then verify that an invalid region is rejected or avoided before deployment and that the resulting guidance is clear.