Are you looking at the right report? The one linked, "How do the largest US corporations contribute to inequality?: Oxfam's Corporate Inequality Framework" [1] has labeled axes, includes a sizable appendix with links to data sources, and covers much more than DEI topics, which are only a subset of one of four pillars ("People"), which also covers workplace conditions, human rights, etc. The other pillars being "Power", "Profits", and "Planet".

[1] https://www.oxfamamerica.org/explore/research-publications/c...