Also try besan sheera .. it work wonders... take 1-2 big spoon of besan and roast it in ghee.. once you see it’s timing little brown then add water / milk of your choice and add little sugar.. you can make it little thick or liquidy as per your kids choice.. give before sleeping and no water after that...

Try to give food to build immunity of child... give dry fruits like that or soak them at night and peel and give in morning...

Did you check with doctor for this is it’s not going ??