https://www.instagram.com/thelunchbox.mama/ is fab!
I’d say as a mum that makes 3 packed lunches 3 days a week that you don’t need to complicate it! We have hot pots (food thermos) so do pasta in sauces, fruit, cheese and fridge raiders plus a little biscuit! Or we do sandwich/wrap with fruit, crisps cheese cubes/fridge raiders and a little biscuit! Sometimes we switch out fruit for salad sticks! My kids school is really strict and we’ve never had any issue with a simple lunch!
I give my little one a sandwich, yogurt tube or pouch, cut fruit (strawberries/grapes/melon), babybel cheese, hard boiled egg, olives, and a sweet treat (he's allowed anything so will put in a pack of mini cookies or something but if it has to be healthy he also loves those little dried fruit snacks). He absolutely loves his packed lunch so I have no intention of mixing it up and trying anything fancy!
My LB has melon, blueberries, strawberries, crackers, cheese, hummus, or a sandwich, sometimes tuna pasta, cucumber sticks, maybe some toddler popcorn and a yoghurt pouch