How to Book a Group Travel with Unaccompanied Minor?
Thing is you cannot send your child with their group of same age legs, a person who can take responsibility of your ward should be there of a legal age for more details to book a group with unaccompanied minor can be found on the blog by Airlines Group Travel which you can find at the mentioned link.
https://www.airlinesgrouptravel.com/blog/how-to-book-group-travel-with-unaccompanied-minors