Google removed App campaign placement data from Ads and AdWords API reports
On January 5, Google removed all App campaign placement data from several reports within the Google Ads API and the AdWords API. To view these reports, Google recommends referencing the App Campaigns Brand Safety Placement report within Google Ads instead.
George Nguyen Group Placement View Google Ads App Campaigns Brand Safety Placement Placement View Detail Placement View
Source: searchengineland.com