I have seen youth with side bars and vbars at indoor nationals.
Im sure there coachs felt they need the added weight on the backside.
I think it would be just like adults. Each one would different.
I certianly think I would just use a side bar only first to offset the sight bar.
Elite bows, Vortex Binos, Trophy Taker sights, Carter releases, Goldtip Arrows. CBE sights, Vapor Trail Strings, B Stinger stabilizers