Do not conflate with Vegan. Each restaurant page explains the evidence and what remains uncertain.
If you're considering the standard Chick-fil-A Chicken Sandwich with an egg allergy, changing the sauce or bun doesn't remove the egg listed in the breaded filet. The sandwich identifies egg, and pasteurized egg appears in the chicken ingredients, so you'll still need to include the filet in your review.
If you're eating at McDonald's with an egg allergy, breakfast sandwiches aren't the only place you'll want to look. The Egg McMuffin names egg directly, and the Surf and Turf ingredient panel lists egg in tartar sauce. McDonald's also says normal kitchen operations may involve shared cooking and preparation areas, equipment, and utensils.
If you’re considering Olive Garden with an egg allergy, the restaurant’s allergen guide offers an important detail that is easy to miss. Some pastas are made with egg and others are not, but Olive Garden says they are cooked in the same pasta cooker. That means an egg-free ingredient declaration may be only part of the picture, and the shared cooking process is worth discussing with the restaurant before you choose a pasta dish.
If you're getting a Starbucks drink with an egg allergy, start with the standard recipe and then check every customization. Review the milk, syrup, sauce, cold foam, whipped topping, powder, and seasonal garnish separately rather than assuming the base coffee or tea answers the whole question. Food can be a second decision; Starbucks lists egg in items such as the Eggs & Cheddar Protein Box.
Taco Bell's allergen tool identifies egg in some menu builds, including the standard Chicken Quesadilla. Because that quesadilla includes Creamy Jalapeño Sauce, chicken, cheese, and a flour tortilla, you'll want to check sauces and every other component instead of judging an order by its main filling.