Here are the materials in Comanche Nation of Oklahoma v. de la Vega [formerly Zinke, then Bernhardt, and now should be Haaland] (W.D. Okla.):
Here are the briefs (so far) in Sault Ste. Marie Tribe of Chippewa Indians v. Bernhardt:
Lower court materials here.
Here is the complaint in Cayuga Nation v. United States (D.D.C.):
Here are the materials in Stand Up for California! v. Dept. of Interior (D.D.C.):
Prior post here.