Following its iOS 14 update in 2021, Facebook Ads can’t aggregate results for campaigns with multiple conversion windows.
As a result, scorecards in Looker Studio (formerly Data Studio) may return as a blank value for these campaigns.
This is expected, as the Meta Graph API doesn't allow offsite conversion aggregation across different attribution windows. It will use unified attribution by default as that will match the behavior of the Ads Manager UI.
Solutions
To work around this, you must:
- Split the conversions by campaign, ad set, or ad dimensions in a table chart. This ensures that correct data returns per campaign, ad set, or ad for their attribution window.
- The only time you can use a conversion in a scorecard is when it’s an on-site action, like Link clicks or Page engagements.