Sir my baby born weight is 2kg now she is 18 months old now her weight is 6.800,, is this normal?

A. Hello mom she is slightly under weight , make sure she is More given baby foods instead as per age she can given usual foods made at home for the family , cows milk , panner , ghee c eggs , dals and channa, rajma , dry fruits and nuts , whole grain cereals, sago , soya etc can be given