The band bought the land, all that Biden seems to have done is some legal shit to put the land into a trust. I think this is just the process of adding those lands officially to the reserve (I could be wrong)
Reading in to this makes me want to go to a protest in DeKalb county as according this NBC news
Many residents who live next to the park oppose the plan, fearing construction of a casino or even a hotel would draw more tourists and lead to a larger, more congested community.
“Myself and my family have put a lot of money and given up a lot to be where we are in a small community and enjoy the park the way that it is,” resident Becky Oest told a House committee in May, asking that the proposal be amended to prohibit construction that would “affect our community. It’s a small town. We don’t want it to grow bigger.”
I'd want to tell them "Land back and I'll go away."