I want to second this as a parent of a child with an anaphylactic food allergy (tree nuts.)
We are also HYPER VIGIANT when it comes to eating out. If I don't like the vibe of the staff/manager I discuss her food allergy with, I have asked to see the kitchen myself and check labels on things not made in house.
Disneyworld and actual Disney Restaurants do food allergies better than anyone. While I hate mega-corps (even and especially ones like Disney) and I think the Disney + terms of agrees thing is total crap, since this was not a "Disney" owned and run restaurant, I don't see how they should be held liable.