Girls, hi ?? My son started teething at 7 months old, by 10 months he …

Girls, hi ?? My son started teething at 7 months old, by 10 months he had 6 teeth. Since then, not a single one has come out, the pediatrician says it's not normal, there should be 8-10 teeth in our age group already. In our peer group, too, they have 10-12 teeth. Does anyone else have their teeth coming out late?