According to Facebook docs ( https://developers.facebook.com/docs/marketing-api/insights/parameters/v17.0 ) the skan_conversion_id field can only be used together with total_postbacks metric; In Fivetran, however, we can select the skan_conversion_id but the total_postbacks and the total_postbacks_detailed fields are not available.   Adding this would enable companies to import data from SKAN campaigns, which would be really useful. 

Here is a sample of the request we would like to make: 

{api_version}/{ad_account_id}/insights?fields=total_postbacks_detailed,campaign_name,campaign_id&breakdowns=skan_conversion_id,skan_campaign_id&time_range={'since':'2023-06-24','until': '2023-06-26'}