See how much the AppleTV app knows about what you watch on Netflix.
The apps voluntarily integrate what you are currently watching and in the middle of watching with the AppleTV app so you can get a consolidated view. Apple isn’t going in and monitoring any more than it’s monitoring your email when it is sent to you.
How is Apple tracking you when apps are sending information to it? Is Apple also tracking your email when companies send email to your iCloud email address?
Absolutely everyone in the Apple ecosystem complains about Netflix not integrating with the AppleTV app.
The apps voluntarily integrate what you are currently watching and in the middle of watching with the AppleTV app so you can get a consolidated view. Apple isn’t going in and monitoring any more than it’s monitoring your email when it is sent to you.