Thanks for asking question! Could you please elaborate your query to help you better on this?
You can deploy applications in Azure App Service in multiple ways. By default, apps hosted in App Service are accessible directly through the internet and can reach only internet-hosted endpoints. But for many applications, you need to control the inbound and outbound network traffic. There are several features in App Service to help you meet those needs.
For Details: https://learn.microsoft.com/en-us/azure/app-service/networking-features
Let us know.