Here is how I would go about in a way that could actually narrow down to a solid explination rather than specualation to what we observe. I would try to find out the name of the job titles that could actually explain this. Chracter designer, custimization programmer so forth. Then watch credits in games where this phenomonen occurs, that you describe, can be seen. Look up the names and compile a list of where they got their education (what state, what name of the college, what professors they had), find a mandatory reading list for their college courses and demographics of students and so forth to see if there is a difference between producers depending on the amount of diversity and so forth. What their sexual leaning or identification (Straight, queer, bi, non-binary and so forth). As you would imagine this would require a lot of hours depending on how thourough you want to be. However I think you save a lot of time but simply find the credits run down that has been recorded and uploaded on youtube. This would also produce material for other videos that you want to make in the future.

Final Fantasy XIV has customization for characters that have dark skin, hairstyles and so forth. Heck, there’s a dark skinned character that’s part human and part rabbit that’s now a main character in the upcoming expansion Dawntrail; though this character actually has an Icelandic accent! Check out that trailer. I have seen some pretty slick takes on dark skin characters. I saw one character that had the brown hair but with gold highlights and neon purple irises in his eyes. There’s a huge graphics update coming for FFXIV in the new expansion and there’s a benchmark that has the new graphics to show off with a character creator; HOWEVER, there’s a corrected and updated benchmark coming out around May 23 that has some fixes due to player feedback. I’d download that one and try it out if I were you!

Another thing, I dont play sports games, but if you do then maybe can tell em, is the level of customization to your satisfaction in games like Fifa, NFL or NBA where you can custimize charcters and where there is a lot of black athletes? If so, then you can probably imagine why.

Also games are extremely expensive to make to the point where it's become norm to outsource certain jobs to low income countries in asia that is very tech compentent. You saw this with warcraft 3 reforge where the art style was ass along with the rest of the game. I think what we're seeing is some growing pain from inflation and earnig requirements that needs to be met by the higherups in order to keep their job. So the level of detail is not where consumers want it to be, but if it is it only caters to the largest demographics of customers or potential customers, which would mean that black americans would take an L. For now. Because I do think it's changing for the better. Just keep producing videos that are detailed on what you want to see and eventually it will be found and met by producers.

Sorr for spamming the comment section, but I just remembered that the sort of custimization that you might desire, is usually something that I associatate with mmorpgs or rpgs in general. Now, I dont know how many african americans but it could potentially be an explination to why the industry looks the way it does. Try to find statistics on demographics if you wanna a lead for future videos.