I know the OP asked about a specific guide (which I do not have experience with)… but since it’s opened up more allergy tips/thoughts- I ought I’d share our Disney allergy experience.
I have celiac, plus several intolerances (some severe, others just annoying). My husband had a cow dairy intolerance which turned into an epi-pen level allergy; and our daughter is a mix with both gluten & cow dairy intolerances, which can leave her feeling sick for days.
Especially for DD- I try and make sure she makes her QS orders in person, (so that neither intolerances are put into her food)… and on that note- here’s my “pro” tip-
often there are many more safe QS options for people to order in person vs what the mobile order menu shows. If something sounds good, but isn’t listed as a mobile order option- go in person & make sure it can’t be tweaked to be made safely for you

In Disney, DD has never been harmed, DH had one very bad experience (at Steakhouse 71- where we’d eaten several times before without issue), and I’ve had a few pretty nasty experiences myself (mainly QS, but others too… & I’m the most diligent/paranoid out of the 3 of us

).
All that said- I/we still feel safer in Disney (food-wise) than anywhere else!! My husband almost always gets sick at restaurants (outside of Disney), and my daughter does too. I fare better than them locally (bc of my double-checking & asking for clean gloves/surfaces, etc)… but it still happens more often than in the bubble (mainly bc they are better trained to take allergies more seriously- as a whole).
I hope your trip goes well & you stay safe!!