I'd say that's up the the indigenous folks. I don't have a very detailed opinion on it in large part because no one will ever ask me for help drafting the landback policy, but in general terms it's a safe bet that indigenous peoples engaged in a struggle for liberation will typically approach the issue of other peoples' liberation humanely.

The few indigenous voices I've heard talk at length about landback have been opposed to creating an ethnostate, even in cases where the leadership is meant to be fully indigenous. It's worth noting that ethnostates as we know them are contingent on global structures of white supremacism to shape racial dynamics