< /rant >
Boy Scouts are for ages 11-18, (or any 10 y/o Webelo who has completed fourth grade in school.)
Boy Scouts have ranks and they must earn their rank badges, it has nothing to do with age. The ranks are Scout, Tenderfoot, Second Class, First Class, Star, Life, and Eagle.
Older scouts can go into Senior Scouting options, including Explorers and Venturing, both of which are co-ed. I was an Explorer in the 1970s.
My late FIL was a scout master for many years and received a Silver Beaver, and all four of his sons became Eagle Scouts.