@akshatgupta-5708 Thanks for your patience on this. I am summarizing the above discussion and posting as an answer for the benefit of community members.
- Based on the shared information, it looks like the customer is referring to application insights resource instead of app service that is the reason they are not able to see the default domain which ends with * .azurewebsites.net in the overview.
- Upon investigating further, from the backend logs we didn't any app service resource under the customer subscription and also when the customer tried to create the app service (AG**app1) it got failed with error Name already exists.
- Customer to created new app service and get the default url/domain of the app service.
Please accept as Yes if the answer provided is useful, so that you can help others in the community looking for remediation for similar issues.