Vitamins for weight gain booster

Hello. Im a first time mom and would like to know if your child experiences slow weight gain. Last May, my daughter weighs 7.7 kg and to my surprise , she weighs only 8.1 kg this month. Shes already 1year and a month old. Thoughts mommies? You might recommend me vitamins for my daughter since she did not visit her pedia this pandemic. #1stimemom #firstbaby #advicepls #momlife