Zoom web hook validation url issues

Hi team
I’m trying to set up a zoom webhook only app,
I m running the express js app which was shared by elisa in the webinars and using ngrok also.
When I use the same url for validating it’s getting validated successfully but I don’t see any post requests coming to the app.

Can u please let me know if u have anybongoing issue with webhook apps.

Rajwsh