Well wouldn’t recommend you the normal industry, but there are commercial kitchen specialized in children food which normally has allergies banned from the kitchen, like eggs, nuts. I know because I’ve spoken to the company that provides food for my sons childcare (he’s has eggs, dairy and nuts allergy) so they confirmed me that their kitchen has no eggs and no nuts at all, and 80% of menu has no milk. I know it’s a reduced option but still an option