This Land. Also to learn more about how Gibson Dunn went scorched earth for Chevron, season 5 of the podcast Drilled goes deep into it.

Also a few blog posts: https://abovethelaw.com/2022/11/supreme-court-indian-child-welfare-act-gibson-dunn/?amp=1

https://lawjournalforsocialjustice.com/2022/03/21/whos-really-behind-brackeen-v-haaland-the-conspiracy-that-a-law-firm-and-big-oil-are-duplicitously-undermining-tribal-sovereignty-through-native-children/

https://lakotalaw.org/news/2021-09-17/icwa-sovereignty

Unfortunately though, issues like this rarely get the mainstream coverage they deserve.