School lunch box snacks

My daughter has just been tested for allergies to foods and she can’t have lots of things. After advise or tips on gluten free, dairy free, soy free, egg free ect lunch box food for school. I know you can buy a lot of gluten free food these days, but a lot of stuff still has eggs eg, gluten free cake mixes. So really wanting some good options other than just fruit and veg. Thanks very much.
Sam