This new iPhone feature was launched with iOS 15 back in the Fall, but until iOS 15.2 lands, it lacks the ability for you to actually view the report.
In addition, the App Privacy Report in iOS 15.2 will allow you to see which apps are tracking you, building on iOS 14’s famous App Tracking Transparency feature.
Apple’s iOS 15.2 is game-changing for iPhone privacy, and it’s coming very soon