Disney says
1/3 lb Angus Beef Patty with Cheese and Lettuce served on an Allergy-friendly Bun with French Fries or Cuties® Mandarin Oranges.
Friendliest.app says
The cheeseburger can be served on an allergy-friendly bun that is free of gluten/wheat, dairy/milk, fish, shellfish, peanuts, tree nuts and soy.

French fries are fried in a dedicated fryer to reduce cross-contamination.

This meal contains milk/dairy (cheese), eggs (bun) and soy (french fries). It can be made soy-friendly by selecting mandarin oranges instead of french fries.

If ordered with a standard bun, this meal is egg-friendly, but contains other allergens.