The biggest impact that school food programs have are on educational outcomes. We know educational outcomes are connected to income potential down the road and overall health. It's an essential type of intervention that we need to be advancing and not neglecting.
I wouldn't necessarily connect it to food insecurity. Food insecurity is largely about income and families not having the income they need to buy the food they need.
With that said, school food programs are essential. They will support families that struggle with access to education and being able to feed the kids while at school.