Girls, is it normal that a 4-month-old baby is 70 cm tall and weighs 8…

Girls, is it normal that a 4-month-old baby is 70 cm tall and weighs 8980 kg? Since birth, he has gained 1-1.5 kg per month (was on breast milk until 2 months). Today we went to see the pediatrician and she said: "The child is overweight! You can't give him formula until 5 months." I give him formula, but not fanatically, because he has started showing interest in food and there are no bad reactions, but I also give a little bit. He's sleeping better now. Is the pediatrician right? I think it's an overreaction!