Visitors using iOS 14.5 or higher have the possibility to opt out from tracking within apps. This means they can also opt out from tracking in the Facebook app. While our system and other systems using the Facebook Conversion API can still send conversion data from iOS 14.5 users, Facebook will discard these in order to comply with data processing regulations. This means that our system can still send these conversions to Facebook but Facebook will not attribute them to your Facebook Ads manager.