An Azure service that provides a platform-managed, scalable, and highly available application delivery controller as a service.
Hello Bhavani,
I reached out to the support team since we needed a quick resolution on this. They identified the issue as repeated Stop/Start operations in quick succession, which made the App Gateway resource unstable and caused it to get stuck in an "updating" state indefinitely.
The support team manually triggered auto-scaling on the App Gateway instance, and after a short while, it started working as expected.
No further action is needed on this. Thanks for following up — please consider this request closed.