No it's true that girls are taller than boys when they are kids since they reach puberty before the boys when I was a kid I was taller than most kids too many ppl didn't even thought that I was a 4th or 5th grade student boys are typically tend to be shorter in height but maybe there are some boys who are taller
For me, I was around 5'6 "or 5'7" at 9-10. My friend, Nick, was taller than me by a couple of inches (though his parents were both tall). It was the same with my younger brother, he was taller than some of his class but not taller than me, then around 13 he shot past me, like a bean sprout. Tho are parents are in the 6 ft.

His brother is 10 !? I thought he was 12 or 13 years old