It's political. Black History month is the only one of those months which was sort of organic I guess.
Blacks helped to build this country in everyway and in most places of education their history and achievements were left out of that education so the idea to educate at least one month a year was started.
Hispanic history month started in 1989 and was montly only a way to try to be equal about everything for the political leaders of each group of people wanting to have a month also.
There is some good in it so that young Hispanics feel that they are truly part of the US and to educate on the best and brightest.
Quite a few Latin people were instrumental in US history (not in a large voting,fighting block as blacks) but back in the days none of those people would have considered themselves Hispanic anyway.
They probably would have called themselves Native American or Spanish or criollo.
As for you being Afro Latina its just not a big enough group in the USA and Afro Latinos are underrepresented in your own Latin media and entertainment so I wouldn't expect better here from the US.
But you have to take part in spreading that awareness.
I've seen Youtube channels such as Pero Like and artists such as Amara La Negra do this.
The avg public dosen't care about Hispanic Heritage month too much.
