The Black Myths Podcast covers a wide range of topics centered on anti-black myths, from a black Marxist perspective. I've loved everything I've heard from them

Mapping the Doctrine of Discovery focuses mainly on its namesake, a lynchpin of white, western, Christian settler-colonialism as well as other indigenous issues. It's a project by members of the Onandaga Nation working out of Syracuse University Department of Religion. They aren't explicitly Marxist but they're sure as hell adjacent. They do have some guests with some L takes on issues irrelevant to their field, but these are generally old white lawyers who've done good work with the American Indian Law Alliance going on a tangent about China or something before the hosts nudge them back on topic