Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
@suresh It appears you may have set a policy up to prevent App Services on your Azure subscription. Please follow the steps in the below doc to review any policies that are currently in place on your Azure subscription.
https://learn.microsoft.com/en-us/azure/governance/policy/assign-policy-portal
Please let us know if this resolves the issue by marking this reply as the answer. Otherwise, if you still have trouble, let us know what policies you have in place.