Hi @Chandru Natarajan ,
Some limits are managed at a regional level, to request a quota increase with support for vCPUs, you must decide how many vCPUs you want to use in which regions. You then make a specific request for Azure resource group vCPU quotas for the amounts and regions that you want.
If you for example need to use 30 vCPUs in West Europe to run your application there, you specifically request 30 vCPUs in West Europe. Your vCPU quota isn't increased in any other region--only West Europe has the 30-vCPU quota.
Something here might also be helpful:
Standard quota: Increase limits by VM series
https://learn.microsoft.com/en-us/azure/azure-portal/supportability/per-vm-quota-requests
Standard quota: Increase limits by region
https://learn.microsoft.com/en-us/azure/azure-portal/supportability/regional-quota-requests
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Best regards,
Leon