Does Google’s tracking rely on iOS to the extent facebook’s does? I don’t use either but I would assume nearly all iPhones accessing fb are via app while a ton

Does Google’s tracking rely on iOS to the extent facebook’s does? I don’t use either but I would assume nearly all iPhones accessing fb are via app while a ton of iPhones accessing Google are via Safari, mail, and even iMessage now that you can play a linked YouTube video directly in the Messages app.