A lot of good and bad things being said in here... and a lot of out-of-left-field remarks.
I'm going to assume that OP lives in North America.
I know people don't want to get into the whole systemic racism conversation, but it's a huge part of why Black representation in the US is not more prominent. And to the person who threw out a percentage of what the Black population is in the US, that's not really the issue. The issue is the racial history of the country, its persistent negligence and oppression of Black communities, and the constant bombardment of white capitalism. It's tough to break a cycle that feeds into itself--that's why Black representation is so important to have in a patchwork country like the USA. (Same goes for all other representations here in the states.)
With representation in the media, it tends to stick to the status quo to maximize profits (capitalism is about what is sellable. Period.) They've sold white heroes/stories to Black audiences--because for a VERY LONG time, that's all that was being made and marketed. Thankfully, overtime, there has been some growth happening to have more Black heroes/stories being marketed. It doesn't reach a large mainstream audience a lot of the time. That's usually due to the smaller funding that goes into marketing Black voices, as well as many other factors that are from the racial tension in the country and with comics being a dying industry. (History of comics has many factors leading to its low point; only to recently make a SMALL come-back with webcomics, but that's non-print. Still isn't as popular a form of media as film.)
Not to mention, many Black communities are discouraged from doing a lot of things--and are also intentionally held back from doing them at all. People in general are discouraged from doing the arts as a career path, so that comes into play here.
If you wanna see more comics by Black creators, you gotta LOOK for them. You'll find them! :}
Below are links to a few friends of mine who are Black independent artists. And although they are not published comic artists in the bigger sense, their work still exists:
These two are my buddies where I live now. They do local expos, and market themselves online:
Adam is inspired by manga and WWE: https://www.instagram.com/halosapien/
Will is into superheroes and WWE as well: https://www.instagram.com/suicidal_assassin/
Jean used to work at a studio in my hometown, and he works on the MetaSabian comic series as well as still teaching classes: https://metasabian.com OR https://artcorner.net
Steffi is an illustrator I met at school, and has done loads of book covers: https://www.steffiwalthallart.com
If you want to see more work by Black creators, they're out there. You do need to look for them.