Hi Yuval,
If you're referring to the Mobile App engagement Campaigns mentioned
here, you can
track the performance using the Campaign Performance Report. If you're having trouble pulling the metrics for these campaigns, could you please share the report definition and your client customer Id so I can take a look? You can reply back via
Reply privately to author option.
If you concern is different, could you share the AdWords UI screenshot or any document that you're referring to, so I can take a look?
Thanks,
Bharani, AdWords API Team