Nah there’s not enough sugar there to noticably impact kids behavior or bellies. It’s basically just a peanut butter banana sandwich with a dash of chocolate, which is downright health food for 5 year olds.
If you really want to punish parents go for one of the “snacks” my MIL gave the kids: captain crunch cereal covered in frosting. I took one bite and the sugar concentration was enough to upset my stomach and leave me feeling very unhappy from the sugar spike and crash
Ehhh depends on the kids. For kids on the spectrum or with ADHD there is actually growing body of evidence and anecdata showing a strong link between sugar and poor behavior