Disney says
Two Angus Beef Patties, Lettuce, Tomato, Pickle Slices, Grilled Onions and SJG Burger Sauce served on an Allergy-Friendly Bun with Cuties Mandarin Oranges or Crinkle-Cut Fries.
Friendliest.app says
The Double Hamburger is free of gluten/wheat, milk, fish, shellfish, peanuts, tree nuts and soy.

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

This meal contains eggs (bun) and soy (fries).

This meal can be made soy allergy-friendly by selecting Cuties instead of Waffle-cut Fries.

Note: The hamburger can be made egg-friendly by ordering on a standard bun, but introduces other allergens.