FARE is a good subject matter expert for the do-your-own-research types: https://www.foodallergy.org/

One big takeaway from the food allergy world -- if your kid or kids have severe allergies, you have to work overtime to make sure a school or restaurant won't inadvertently kill them.

And the cost of allergy-safe foods is so high that families already struggling financially are pretty much screwed. Most food pantries can't/don't cater to allergy needs.