Intuitive eating is different, especially kids who have access to food but just choose a lower meal frequency.
. But encouraging kids to actively fast (as in consciously skipping meals or going days without eating because they're trying to follow an IF protocol) is just guess work as pretty much all the studies on IF are done with healthy adults. Several sources I've read said IF should not be recommended for kids, pregnant women or diabetics.
I remember sitting in 4th grade with stomach pains from breakfast. Don't know if it was the milk, or the cheerios. I do remember that it was about then that I didn't want breakfast anymore. I never ate breakfast after 13 (freshman/highschool) Tried later on (40's) breakfast is not my most important meal.