to me it depends on the circumstances of the family
in our household no its not to young my now 11 y old(would be y6) has had his own monthly(always a good phone)phone since he was 3, but to us its used as an educational and communication tool, same with a tablet and a decent laptop, hes always had his own
we home educate (always have done, and will continue to) using the unschooling/world schooling method, this is completely child led
as a lot of our learning is outside of the home he uses/used google to look up things.
because of numerous disabilities hes a visual learner and because of a working memory disorder(one of many diagnoses)he needs apps and websites to learn.(there are thousands,)we also use YouTube a lot, there is plenty of educational channels, which he watches put and about and on journeys to get there. this is how we educate and learn.
he only has a hand full of numbers in his phone and that's only family and close friends.
he uses WhatsApp to keep in contact with friends and family and has tiktok, but tiktok does have educational accounts on it.
he also uses a phone to read(as do i)
he was non verbal till he was 6 and used his phone via an app to communicate.
people just think children of a certain age wants phones to text and go on social media. a descent smart phone can be used for so much more and adults need to open their eyes and brains to that possibility