Hi @tarun00197,
There are no specific doc for the one you asked. I would suggest you to follow the below steps:
- Deploy your web app in two or more regions.
- Deploy Application Gateway in the respective region where you deployed the Web App and add web App to the backend of Application Gateway and configure it. (Ref: https://learn.microsoft.com/en-us/azure/application-gateway/configure-web-app-portal)
- Then deploy Azure Frontdoor and configure the AppGW as the backend and configure the routing rules in AFD.
Regards,
Msrini