There was that news article just the other day that some obnoxiously high percentage of youth (80%?) wanted iPhones over Android devices. There is a reason why every other phone company copies Apple and it isn't just because it is cheaper to copy than be original - Apple has a lock on the youth market. In this particular case, they are copying something not aesthetics/design related, but if you are going to copy one thing, you might as well copy everything that Apple does. Or at least that is what these companies believe they should so.
I'm a teenager too and these trends are stupid. The only two reasons in the United States for iPhones being popular are because of the "Ecosystem" and iMessage. Unlike every other country where they use an app like WhatsApp or Signal or Telegram and no one bats an eye on what you use. I find it better to stand out rather than blend in with the crowd.
It is worse in Asia and I would say in parts of Europe it is just as bad. Apple's marketing is second to none and one thing teens care about more than anything else, that's image and branding.