Disney says
Served on an Allergy-friendly Bun with Dannon® Danimals® smoothie and Sliced Apples with choice of Small Lowfat Milk or Small DASANI® Water.
Friendliest.app says
The hamburger can be served on an allergy-friendly bun that is free of gluten/wheat, dairy/milk, fish, shellfish, peanuts, tree nuts and soy.

This meal contains eggs (bun) and milk/dairy (smoothie, milk). If ordered on a regular bun, it is egg-friendly, but contains other allergens.