New account because I’m a lazy lurker, but “diversity related” projects could be as simple as trying to balance the number of studies done primarily on white males vs other groups. Especially in biomedical research, the gender of the population studied has a profound effect on the relevancy of results.
By many measures, over 75% of studies have historically focused on white male populations, which for a variety of potential research/treatment areas, is important to control for.
https://www.google.com/search?q=percentage+of+medical+studie...