my daughter is 2 years 8 months.. and weight 9.5 kg.. super active and achieved all milestones. how can I gain weight? birth weight was 2.345kg

A. dear mum , give a balanced diet 3 meals 1 snack wholesome meals variety of food group grain / millets , protein in every meal from legumes beans dal / egg non veg , nuts , curd paneer veg, fruit, add ghee