That’s not what indigenous means.
It simply means first group to occupy an area. Which means some indigenous people have only occupied their territory for a few hundred years. Others for many thousands.
That’s how it is used by the race hustlers.
That’s how it’s used in archeology and anthropology. It’s been used that way for many decades.
Of course there are people who attach a value to the designation but that’s on the person who does it. For instance many freepers seem to think it has inherit property rights. I don’t think so but if you do that’s on you. It doesn’t change the meaning of the word.
Reparations for Neanderthals now!