An Azure service that provides a platform-managed, scalable, and highly available application delivery controller as a service.
Hello @Gopal Soni , Welcome to the Microsoft Q&A forum.
As per my understanding from the question above you are planning on upgrading your Application Gateway Standard V1 to Application Gateway Standard with WAF V2 in your production environment.
If my understanding above is correct you can follow this documentation to create WAF_v2 gateway. Please go through this Limitations section before you run the script to migrate your application gateway. As you are enabling WAF for your gateway, it is recommended that you run a newly deployed WAF in Detection mode for a short period of time in a production environment. This provides the opportunity to obtain firewall logs and update any exceptions or custom rules prior to transition to Prevention mode. This can help reduce the occurrence of unexpected, blocked traffic.
Hope this helps! Please let me know if you have any additional questions. Thank you!