@Prasanna Bandi - Thanks for the question and using MS Q&A platform.
By default, for any subscription there will be specific limit on the VM cores available per region based on the OfferType. Certain Azure regions require customers to go through a request process in order to gain access. To request access to these regions, a customer or their Cloud Solution Provider may open a support request and work with our Support team to discuss or enable access.
Note: 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 (Which is complete at free cost) or try to check the SKU available in you subscription and try to utilize the same to create.
For more details, refer to Resolve errors for SKU not available.
Hope this helps. Do let us know if you any further queries.
If this answers your query, do click
Accept Answer and
Yes for was this answer helpful. And, if you have any further query do let us know.