My baby is 2 years 2 months old and his weight is 9.20 kg.His born weight was 2.90kg. He lost 1kg in a week. His weight was 10.35 a week ago. please let me know it is something to be concerned about

A. dear Mum did the child suffer from illness or infection as it can affect the weight give nutritious healthy diet 3 meals and two healthy snacks egg , non veg, sprouts, chana sattu, pulses, beans powdered nuts to food, dry fruits , paneer include seasonal fruits and vegetables in daily diet