I really can't see anything at all with that boys hair it is fine.
I'm white but have read a lot about how white standards around "presentable" result in time effort money and impracticality for others.
I really don't understand the focus on this sort of petty stuff. The boys looks fine. He looks neat and tidy and smart. What do the school think his hairstyle signifies? How will it distract other children from learning? Does it move on it's own, does it sing?
I understand that this is my view and a lot of people are very very keen on petty trivial rules and think how you look is of extreme importance.