Take your kids grocery shopping and see what they want:
It’s summer, so they might enjoy cold sandwiches and salads (wraps, pitas, etc).
You can get prepared foods at the deli (rotisserie chicken, fried chicken, sides, etc.).
There are all sorts of frozen options that are pre-cooked that they just need to warm up - from full dinners to pizza, chinese dumplings, hot pockets, breakfast sandwiches, grilled chicken strips, veggie burgers, etc. Trader Joe’s has some great Indian dinners and other interesting options (I like the fried rice). Frozen veggies are super easy to microwave, and don’t require prep. They’ll probably prefer the fresh fruit of summer, but frozen can be really convenient, and you don’t have to worry about it spoiling.
Canned soups, chillis, meats, etc. are also convenient. They make pouches of Tuna with different flavorings for easy lunches. Canned beans/refried beans, jarred sauces, extras like olives, mushrooms, pickles, etc., can round out the meals.
Even if they don’t want to cook on the stove, many stovetop foods can be cooked in the microwave. Corn on the cob is great microwaved. Potatoes can be “baked” in the microwave. Instant rice is microwaveable. While the quality may not be quite as good, eggs can be scrambled in the microwave, and after you’ve added salsa and cheese, pre-cooked bacon crumbles and cheese, or whatever toppings you prefer - they’re fine. With a little practice, I’ve even cooked foods like Ramen and Kraft Mac and Cheese in the microwave - you just have to limit the water so that it all gets absorbed and doesn’t have to be drained.
Basically, even without using the stove, there are still an abundance of options. Just let them browse for themselves and determine what they want to eat, how much they want to work, and how they’re going to balance the two factors.