She is 33 months now but not gaining weight y

A. its normal as some babies are healthy but not look chubby, do not worry if baby is active, eating well, playing well and learning new things daily then she doesn't need to get extra weight just to look healthy, she is healthy from inside. if baby is not taking proper meals , less active, underweight then do consult with your pediatrician regarding this once as he will guide you better after proper examination and analyzing the baby and suggest you best accordingly