Piper Jaffray do a semi-annual study on US teens which includes the categories in which apple market a range of devices.
The tl,dr: Popularity of apple in youth is and remains consistently high.
As this is a US-centric forum conducted in English I think it’s safe to use PJs research here.
One of the things that distinguishes Apple is its focus.
It’s added services like Apple Music and TV but it absolutely doesn’t need to compete with TikTok etc.