my baby is 1yr 8 month old and he weighs around 9 and a half kg like this was weight we last checked somewhat around 15 days

A. The child should be at least 12 by the age of two years right now even if your child should have been 11 that was also good this is little less as per the age along with the food that you give please include more of proteins fats carbohydrates and calories in moderation