Hello,
If you are making an API call against a Test account, you will need to set
includeZeroImpressions to true as the test accounts do not have any metrics. Could you please confirm if you are receiving any errors while making the API call? If so, could you please share the details? If you're not receiving any error, could you share the report query along with the client customer Id, to investigate further? You can share the details privately via Reply privately to author option.
Thanks,
Bharani, Google Ads API Team

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