My ds1 is dairy and egg llergic too.

I find most things are fine, but read ingredients well

you can get "no egg" it replaces eggs in cakes, nuttelex for marg/butter and soy/flavoured soy and rice milk to replace rice milk. I just substitute these in cakes and things.

Things like chicken wings spice mixes are generally ok.

But be aware of whey protein And milk solids.

With the no egg you can do home made rissoles and burgers and meatballs, just use half the water.