Capoeira is analogous to Santeria in the Caribbean Islands; both were developed by slaves transplanted to other countries in order to disguise the true purpose of the practices. Capoeira was developed in Brazil, ostensibly as a dance, to disguise the fact that it was a fighting technique; not something that slave owners would condone for obvious reasons. In the Caribbean, Santeria was a way for the slaves to practice their outlawed native religions by giving the native deity the names of Roman Catholic saints.
The reason that it is not found in Africa is simple; it was never there.
The reason that it is not found in Africa is simple; it was never there.