Disney says
Two Impossible™ Patties, Dairy-free Cheddar, Lettuce, Tomato, Pickles, Grilled Onions and Plant-based Sauce, served on an Allergy-friendly Bun with Cuties Mandarin Oranges or Crinkle-cut Fries.
Friendliest.app says
The Double Impossible™ Cheeseburger is free of gluten/wheat, milk, fish, shellfish and peanuts.

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

This meal contains tree nuts, eggs and soy.