Azure Functions Flex Consumption: persistent HTTP 429 when creating plan in Italy North after waiting over 48 hours

Question

I cannot create an Azure Functions Flex Consumption plan in Italy North because Microsoft.Web returns:

“App Service Plan Create operation is throttled for subscription. Please contact support if issue persists.”

Timeline:
- September 2, 2026: deployment was blocked by HTTP 429 / extended code 51025.
- After waiting more than 48 hours, I made one controlled attempt on September 5 (local time).
- The same HTTP 429 occurred. I canceled the deployment and stopped further attempts.

Configuration:
- Azure Functions Flex Consumption (FC1)
- Region: Italy North
- Python 3.12
- 512 MB memory, maximum 1 instance
- Deployment through Azure CLI using a workload-specific Bicep template

Bicep compilation, ARM validation and what-if succeeded. Existing Function Apps remain deployed; the new plan and Function App have not been provisioned.

Latest failed operation:
- UTC timestamp: 2026-09-04T23:02:15.587092+00:00
- Correlation ID: 816e64ed-367e-4e8e-a1b1-c41d23170996

The Azure support flow requires a paid technical support plan.

Could a Microsoft moderator help clarify:
1. How can I determine when this Microsoft.Web creation throttle expires?
2. Can Microsoft investigate or clear a persistent throttle through a channel available without a paid support plan?
3. Is any additional diagnostic information needed to distinguish this throttle from a regional capacity or quota restriction?

I would like to retain the existing region and Flex Consumption configuration.