In the first place, there was NEVER the possibility that “AIDS” (you mean HIV) was made in America. While the condition known as AIDS was first described from the USA, the virus was in fact first described from France – and pretty much all in the same year, from the USA and UK as well. Moreover, when people went looking for HIV and related simian immunodeficiency viruses in Africa and elsewhere, it quickly became apparent that:
1) there was considerably greater viral diversity in Africa than anywhere else in humans
2) there were a LOT of SIVs in Africa, in a lot of different monkeys – and two of them were most closely related to HIV-1 (from chimps) and HIV-2 (from sooty mangabeys), indicating that is where those viruses came from.

More molecular archeology followed, and it was shown that archived blood samples from as long ago as 1959 contained HIV-1 (from Kinshasa, DR Congo), indicating it entered humans before then – which was WAY before anyone had discovered retroviruses, let alone the kinds of skills and reagents necessary to deliberately make recombinant retroviruses. It is also obvious from HIV sequence analysis that the viruses are NOT recombinants of anything else – although they do recombine like rabbits with each other.

Further sequence analysis has shown that HIV has probably been in humans from early in the 20th century, in West Africa, and there was a slow expansion of the number of infected people, before modern transport modalities allowed the explosive spread that was seen from the 1980s.