Honestly I always grab a bottle of water and bring a snack of my choice from home prior to boarding so I have what I like when I want it and don't have to wait for service. Then if there are snacks its a bonus ! If the website isn't advertising snacks then I would plan for nothing just in case.
If I am traveling through a mealtime with my kids I also pack a lunchbox cooler with shelf stable lunch items and then add drinks from after security.