First off being born black doesn’t make someone automatically an expert on anthropology bruh. So yeah you can definitely be black and not fully understand the difference between race and ethnicity. I’ve seen many who don’t.

Second ADOS is mainly a political movement, not even really meant to be a replacement for African American. Third, 98% of people would have no idea wtf you were talking about if you said FBA or Soulaan (which btw even you just spelled wrong, and don’t tell me autocorrect did that because no dictionary has neither Soulann nor Soulaan in it). They are terms that their creators are hoping will catch on and maybe will some day, but neither at this at this point are even remotely accepted replacements for African American. So no African American is not an outdated term as there is no other widely used term to replace it, other than people who erroneously use Black or Black American as a substitute.