Girls, hello everyone. Such a question, we've been together for 10 mon…

Girls, hello everyone. Such a question, we've been together for 10 months and a week, and I noticed that my son doesn't respond to his name, plays and ignores if he's called by his name. It wasn't like this before. Could it be ignoring because he's engrossed in a game or toy? Or is it better to consult a neurologist? Everything is fine with his health, nothing bothers him, he sleeps well, eats well.