SuburbanRhonda - my school dinner eating days were the 90s so not had them since slightly healthier trends have kicked in!
But to be honest, and I'm not a healthy food fascist, in some ways isn't it not just about what's in the actual food in terms of e.g. sugar being used in cakes but also about the way it influences childrens' views of a balanced diet. In general these days don't parents want to try to move away from the idea that you have cake or biscuits for pudding every day as a normal thing? I grew up always being given pudding after dinner (and not fruit or yogurt!) and I certainly don't think it's helped my attitudes towards sweet treats.
So okay maybe kids are being given sugar-free biscuits and healthy cakes that don't contain saturated fats, air-fried chips or whatever. But when they go out as teenagers and start making their own food choices will they automatically pick sugar-free healthy air-fried options or will they just think hey we had chips several times a week at school, the chip shop will see plenty of me, and I always have something sweet after a meal, what cake/chocolate is there in the corner shop...