Hi Sagar, I am not very sure about what City for Zoom related infrastructure you refer to.
For zoom monitoring, we would recommend AST (Automated Session Test) running on Endpoint agents. These tests would be executed only when a user uses an application (for example: Zoom) on their device. The data collected from these tests can be used for troubleshooting issues faced by the user while using the application. This KB is about how to configure AST test:
https://docs.thousandeyes.com/product-documentation/end-user-monitoring/automated-session-test/configure-automated-session-tests
The Path Visualization view will shed some light on what and where the problem may reside.
I hope you find this answer useful. Please let me know if you have any other questions.