(It’s worth pointing out that the Conversion API is a different product than Facebook’s conversion lift studies tool, which measures the incrementality of Facebook ads, and was recently the source of ...

Facebook Ads Updates: Conversions API Gateway & AEM for iOS14 Users See what's new in Facebook Ads updates designed to help advertisers with measurement issues from the tracking prompt fallout.

These new improvements on the Facebook Ad side are an attempt to fill that reporting and measurement gap while still maintaining user privacy.