Disney will have water and Powerade available at each water stop. These stops will generally be every 1 to1-1/2 miles or so (more towards the latter half of the race). There are also a couple of stops that will have some kind of fuel (used to be gels, then sport beans, now ??), and also bananas. The course map in the digital event guide--when it becomes available a month or so in advance--will show the stops.
That said....you should ALWAYS have a nutrition plan for your race and practice it in training. You need to find what carb source works for you (sport drink/gel/chews/food/whatever) and plan on using that. If you want to rely on course carbs, you need to train with them.
ETA: Here is last year's course maps with stops shown.
https://www.google.com/maps/d/viewe...&ll=28.38744636101127,-81.56616950000002&z=13
Also, I saw this in the 2022 thread (from the event guide)..
"There will be 5 food stops on the Marathon Course. Between Mile 9-10 Honey Stinger Chews, Between Mile 14-15 Bananas, Just after Mile 17 Bananas, Just before Mile 21 Honey Stingers chews, and Chocolates just before Mile 23."