Why don’t the app and the client ID always appear on an API’s log?

One of the pieces of information that the Manager’s Trace shows is the application that originates a request. However, for this info to be displayed the API needs to contain in its flow an interceptor that validates the client ID. Then, the Manager can identify the app from the client ID informed in the request. The interceptors that can be used are OAuth or Client ID Validation.

You can check another question to see examples of these interceptors in use and how the credentials are displayed on the Trace: How to identify who is consuming my APIs?.