Despite the intent to be unbiased, most scholarly, peer-reviewed publications are not perfect. The people who make publishing decisions are mainly white, cis-gender straight people without disabilities. This means that even works focused on diverse populations are not often written by those who identify as part of the diverse group on which they write. Furthermore, the systems developed to organize information and algorithms used to search for information assume that being straight, white, and male is the default.
If you would like to learn more about promoting scholarship by Black/African American and other underrepresented groups in academia, Cite Black Women is a great resource to check out. They host a podcast on SoundClound (embedded below) and you can follow them on Twitter, Instagram, and Facebook @citeblackwomen