Some do and others not.
There is not a hard promotion/relegation policy at these young age groups and so clubs/teams can select level of competition.
In some cases, some may not want to travel statewide at 10 years old and choose CPL South div I. This Super Cup competition is club based and in some cases teams can be adjusted, such that a particular team playing lower level in CPL South can be made more competitive through adjustments to rosters (akin to guest players).
But you are correct, there will be some teams at U11/12 who will face some teams they see in league play. In that regard (at upper age/talent level) I would consider this more like the SCYS State Cup format at U14 where top teams move forward to play each other again.
I know our teams are very excited about this opportunity and event
