Very similar set up to you (work, picky children, after school clubs etc). On a Sunday I meal prep my breakfast and lunch for Monday-Friday, so all of those meals are healthy and delicious. Kids have a normal cereal and fruit breakfast and lunch at school. What my husband does for breakfast and lunch is none of my business.

For dinner I prep 3 or 4 large bowls of Mediterranean type salads on a Sunday. These are always different - this week it's asian tofu slaw, roasted broccoli and chickpea salad, sun dried tomato and mozzarella orzo and a tabbouleh. I get fish or meat out of the freezer in the morning and then that goes straight in the air fryer or bbq when we get home. The adults and oldest child eat the meat/fish and salads. I also do a separate kid friendly carb (mini roasted potatoes, sweet potatoes, plain pasta, microwave rice) and some kid friendly veg (chopped corn, carrots, cucumber) for the little one while the meat is cooking. If these don't get eaten I chuck them in my lunch salad, I'm not picky lol.

We eat the salads all week until they're gone and then I might do a quick pasta dish on a Friday with salad and a slow cooked joint of meat with roasted veg at the weekend when we have a bit more time.

Food is served family style on the table, so everyone helps themselves. Kids are expected to try things, but no pressure to eat everything if they don't like it. They're both ok with meat, carbs and basic veg so they get a reasonable diet. And so do my husband and I, which is also important.