@Riya Aggarwal Welcome to Microsoft Q&A forum and thanks for reaching out here.
What is they SKU type you are using while deploying the ADX cluster?
SKU availability differs based on the following factors:
- Region: Not all SKUs are available in all regions or availability zones. For more information, see each SKU page for regional availability.
- Subscription: Some SKUs may only be available for specific subscription types. If a SKU isn't available for your subscription in a location or zone that meets your business needs, submit a SKU request to Azure support.
For SKU options and availability, kindly refer to this document: SKU options
Kindly review your cluster configuration and sku selection and let us know if it is under valid region and the issue still persists.
We look forward to your response.