Bland foods. Crackers, toast, rice, bananas or pasta. Avoid foods containing dairy like cheese etc. It’s not too much of a concern with them not eating when the have a sickness bug, as long as they’re staying hydrated xx
Give her sips of water and if she can stomach that try dry crackers or digestives, or plain toast
Likes others have said plain toast, crackers and bananas. Get her diarolite to rehydrate her - even if she has a few sips of it, that's fine as it'll help with lost electrolytes x
Could you try plain pasta or chicken