Check that the webhook is enabled in the correct project, covers the intended number, and subscribes to the event you expect. Your receiver must also be reachable and accept the delivery. A successful API request does not confirm that a webhook reached your server.
Review your receiver logs for the same time and event type, including rejected requests. If the configuration and receiver appear correct, report the event or message reference and time to support. Remove endpoint credentials, signing secrets, and customer payloads from any log excerpt.