Possibly at the resort food courts, but I am not sure.
We were just there 10/14-10/23. The "no dessert at breakfast" rule went into effect on 10/15. Since we checked in prior to that date we were allowed "dessert" with breakfast and we all chose fruit every day.
We had "real" dessert, like cake, with lunch. There was ONE time in the evening that I got chicken strips, fries, and a fruit bowl for us to snack on in the room and they did not question my fruit as a dessert. So depending on the resort and who is working the register you might be able to get fruit as a dessert. I don't know if the CS places in the park even have fruit. I didn't pay that much attention because we rarely ate a proper lunch - usually just breakfast, snacks, and a big dinner.