How to check if Cloud Function (1st gen) App Check is working?

I set up App Check on my cloud function, and it runs well when calling it from my iOS app. The thing is, running it from my app, I have no logs or 'proof' that the function did check the app.

So how can I check that the cloud function is indeed doing the check it's set up to do? (yes I have trust issues :))

One thing that got me to question it is that as opposed to the Cloud Firestore App Check done from within the console, when built the cloud function and ran it, I was never prompted to provide my Apple AuthKey, Key ID and Team ID (like done in the console). Thanks!