* When I buy a new Macbook or upgrade the OS, I get a "walkthrough" of new features which tends to include integration with other Apple devices.
* Most Apple apps (e.g. Home, Messages, Photos, Maps, Podcasts, FindMy) advertise their integration with other Apple hardware.
* Only pre-installed browser is Safari, and the homepage is apple.com.
They might not be blatant, but I'd highly surprised if the marketing department isn't involved in their placement. They don't, for example, mention any competing products.
Also, there's no obvious reason Apple has to advertise the Apple Music subscription when I open the app to play my own MP3s.