Native Americans have far more consideration than Tibetans do. They are free to live per their culture. They can practice their religion. They can use their language. They are afforded every right American citizens are. There are several hundred Indian reservations, totaling something like 2.5% of US soil.
This is by no means a justification for the genocide of native Americans or a way to say they’ve been made whole. But there is simply no fair comparison between their situation today (despite huge injustices in the past) and the situation of Tibetans.
The arc of history is usually this: minorities are viciously attacked when they still represent some political power and are seen as a threat by the majority, and they are cherished and afforded the rights and considerations you mention when they have almost disappeared and have become a harmless item of nostalgia and exotic charm.
You can see this dynamic play out across all cultures.
They're supposed to be separate Nations. State government even invade these supposed sovereign Nations enforce their own laws on them. California had a ban on slot machines in went into the reservations and remove the slot machines from them because it was against California law.
There's thousands of contracts (treaties) that have been broken and voided by the courts as being essentially too old or unenforceable in a modern era because of other other issues such as local populations.
They can't make their own property laws. They're not allowed to own the land and it must be put to trust for the entire tribe that way they can't use it for anything like loan collateral they can't sell it to somebody they can't start businesses easily since that form a collateral isn't available to them. The bureau of Indian affairs forces various Federal regulations on them they shouldn't have to oblige.
The federal government basically tells them what their culture is and often groups fighting to defend those imposed laws are pure whites who have no idea what they are talking about and will not let them improve and advance at all because they have this romantic notion of what it means to be an American Indian I want them still living in hide huts so they can go visit them like a zoo. I shouldn't have to bring up brave New world for this.
Look at the big kerfuffle over the Seminole mascot at the University of Florida. There are many from the tribe that actually liked it because it brought recognition to the tribe but a bunch of do-gooders came in and made a big deal about it even though they had no connection to the tribe. It should have been something for them to discuss and not have to worry about anybody else coming in and trying to force their opinion.
It wasn't too long ago that the trail of tears and forced relocation was the policy we even have the $20 bill with the guy who did that.
You need to rethink what it means to be a sovereign Nation. If the EU came in and took over the US basically said it's for your own good what would you think?
Native Americans have significantly more rights than, for instance, Indigenous Australians do.
Federally recognised tribes get to run their own elected governments, police forces, court systems, make their own laws, even exempt themselves from provisions of state law in certain cases. Indigenous Australians don’t get any of that
You are right that there are cases in which states or the federal government infringe tribal sovereignty - but at least they have it to begin with. And attempted infringements don’t always succeed - consider the 2020 US Supreme Court case McGirt v Oklahoma, which found that Oklahoma state courts lack criminal jurisdiction (for “major crimes”, which includes murder, manslaughter, rape, arson and burglary) over Native American defendants in the eastern half of the state, such jurisdiction only being possessed by the tribal and federal governments, not the state of Oklahoma.
This is by no means a justification for the genocide of native Americans or a way to say they’ve been made whole. But there is simply no fair comparison between their situation today (despite huge injustices in the past) and the situation of Tibetans.