Hi,
Thank you for reaching out to the Google Ads API support team.
When your Google Ads reports are exported to BigQuery, they are structured into tables and views within the BigQuery environment. For more information, you can refer to the Google Ads report transformation to know how Google Ads reports are transferred to BigQuery.
Since your concern is related to BigQuery Google Ads Data Transfer, I would suggest you reach out to the GCP Product Support team for any inquiries regarding BigQuery. Kindly note that we can only assist with technical queries or concerns related to the Google Ads API.
Thanks & Regards,
Google Ads API support team.