You stated that American blacks had to deal with the legacy of slavery that happened more than a century ago. The epicenter of modern day slavery is Africa, with Africans enslaving other Africans. In 2018, about 62% of the African population endured some from of slavery.

If immigrants from Africa do better than native blacks, it isn't due to the legacy of slavery. Jamaicans, Dominicans, and Haitians have endured the legacy of slavery too, yet these immigrants do better economically as well. If systematic racism was real, it would hold back all blacks.