I'm confused about this entire thread and the lawsuit considering that, as far as I can see, Apple's privacy statement explicitly says "across apps or websites"

I'm confused about this entire thread and the lawsuit considering that, as far as I can see, Apple's privacy statement explicitly says "across apps or websites". There's nothing about the privacy policy that states that they can't track you within a single app. I don't see any evidence, in the video or otherwise, that what's going on and what's shown is going against that policy. Maybe I'm naive to think that Apple doesn't cross-pollinate this data but I don't see any evidence to suggest that that's not the case or that any of this is malicious.