I am using Tiktok Business Account to run Tiktok Ads, and have a plan to get raw data from Tiktok API using the document in this link https://business-api.tiktok.com/portal/docs?id=1739562438061058. However, I have trouble in getting the Ads audience size by ad_id level.

The audience size is related to the Audience report on Business Account Management with some special fields like Ad group ID, Audience name (attached by the following images)

Can you help me to find the way to get this data

Thank you and best regards