There is such a thing as lighting, type of lighting, using brighter lights, and processing of images[1][2][3]. From a technological and photography point of view, these types of issues can be resolved. Often the issue is the refusal to create a different setup for darker subjects, or purposefully injecting stereotypes or bias to not find or use obvious solutions.

Furthermore, because people have dark skin, doesn't mean they have the exact same bone structure, facial proportions, or symmetry.

[1]: https://creativecloud.adobe.com/discover/article/10-tips-for...

[2]: https://organicheadshots.com/how-to-photograph-people-of-col...

[3]: https://calgaryjournal.ca/2021/02/28/time-for-a-new-lens-the...