Except Apple doesn't do cross-app tracking for advertising purposes. The reason they don't have to follow the same standards is Apple Apps don't do what ATT prohibits - track activity across multiple apps for the purposes of selling advertisements. Adding them to the list would imply that they do, which in addition to being untrue, would counter Apple's value proposition and marketing that they don't track users the same way others do.No, this is the fact that the internal Apple apps don't have to follow the same standards. This simplest thing for Apple to do would be to have the Apple apps turn up in the lists, with the tracking options turned off and the slider disabled, job done.