There will be no lunch at Sanaa, only Breakfast and Dinner. There will not be room service for B, L & D. Also, there will be no CS but rather a grab-in-go kiosk for fountain drinks, fruits, snacks, etc -- nothing cooked.
All of this can/may change after they open, depending on the requirements and requests of the guests. However, when Kidani opens, this will be the arrangement. As a PP stated, due to the rooms having kitchens, there will be no 24-hour food service provided via the resorts kitchens. One more bit of proof: if AKL doesn't have a formal sit-down venue for lunch, why would its DVC off-shoot? Answer: It won't.