Restaurants don't even have to track and disclose what allergens their food contains.
Good. Restaurants are hectic to work in. Menus can change quickly, and many dishes are being cooked and prepped at once. Cross contamination chances are high, so if a restaurant MUST say an allergen is not in X,Y,Z they basically can't have it in their restaurant at all.
They have to in EU!
https://food.ec.europa.eu/food-safety/campaign-2026/allergie...
But you understand that if it were required, everyplace that doesn’t specify today, would slap allergens on the whole menu.
It's crazy how nothing has been done in the US about this. I got an egg allergy in my late 20s, I had never thought about it before and now eating at restaurants is such a hassle. Even the delivery apps seem to have zero affordances for food allergies, at least with a restaurant you can get some assurance by asking the staff.