Hi Maxim,
Thank you for reaching out. The API call of the TargetingIdeaService on the test account is providing the real data. What you could do is to configure the parameters to get the best possible results. You could refer to this guide for more information.
Thanks and regards,
Xiaoming, Google Ads API Team
Hi Maxim,
Thank you for reaching out. Please use a production account to generate the real data with the TargetingIdeaService. Please let me know if you have any further questions.
Thanks and regards,
Xiaoming, Google Ads API Team