There'll be snacks. Flights over 900 miles get to pick items from "premium" snack basket in C+. They used to have some fresh fruit options in basket pre-Covid, but now it's just pre-packaged stuff. It'll tide you over, but it won't be terribly substantial and you should probably plan on eating a meal before flight.
- Great Circle Mapper
https://www.delta.com/us/en/onboard/...a-comfort-plus