She ia good for her age if lean or fat doesnot matter concentrateon the whole diet food daily

Greetings 19kg, a 4-year-old girl is generally within a healthy weight range or even above average for her age. The perceived leanness may be due to recent growth spurts or the effects of past frequent vomiting on her body composition. Potential underlying causes for chronic vomiting include gastrointestinal issues, food intolerances, or metabolic concerns. Management typically focuses on high-calorie, nutrient-dense foods and maintaining consistent hydration.

Weight is appropriate. Children when they are growing upto 7 years look lean and lanky. It is normal growth process.

We have to look for the cause of vomiting in this If there is any abdominal issue that child is having

If baby is active and playful and not frequently falling sick then no issues

Consult with Pediatrician physically for further evaluation and treatment

Yes weight looks little lower side only because of frequent vomitings