When reading, most people like to read by themselves. Reading just needs a quiet environment, there is no need to talk about anything endlessly. Because everyone has their own different views on the same book, we can't generalize, so reading by ourselves is the best state. When you need to communicate with others, chatting with friends will naturally talk about these. You can watch it yourself when you don't need to communicate, and you won't be disturbed by others. This should be said to be a normal performance. You can't directly think that children don't like making friends in their daily life.
If a child likes to make friends, he must be given the space and right to make friends. Parents should not always point fingers at their children's friends, and then always think that they will go out to play every day after making friends, and they don't know that studying at home is not good. You can have your cake and eat it. It is impossible for children to have a rich circle of friends, and they are worried that he will go out to play wild every day. You have to give up something. Every child's growth trajectory is different, and you can't infer the child's current life development completely from your past experience.
Everyone's personality is different. Some children may be slow, but they have fewer friends. It doesn't matter, because at a certain age, as long as he has normal interpersonal problems, not the mental state of autism, then he is a normal child. He just doesn't like making friends with others, and he doesn't like the particularly noisy environment. This may be related to parents' upbringing and personality, because what parents do, what they say and do will subtly affect their children's personality.