15 months baby boy weak in communication

I have 15 months baby boy. I feel that he has some developmental problems seen in autism like he doesn’t respond to his name, dos not point out things, he claps but doesn’t wave his hands, sometimes he flaps his hands when get excited, sometimes he swirl around. Does not copy our gestures. Beside this he is normal. His health is fine. His weight and height is normal. He babbles. Says Mumma when crying. He can walk, run and climb very fast. Sometimes he eats by himself. Play with toys, kitchen utensils and water. He take off things from drawer and trolly and put them back. Throw things. He watch tv, mobile a lot . Enjoy nursery rhymes, songs with laugh. He follows his mother and cries when she leaves him. He goes to every family member. He use to play with kids a month back but now here in lockdown no kids to play. But I am confused with his some behaviour as mention at starting. Whether it is matter of concern, early sign of autism. Please advice.