It being a settler colonial state means that a sufficient reform of its structure would no longer resemble what the United States of America looks like anymore, and so, it would cease to exist

Sorta like Israel. If you fixed its issues it wouldn’t be a Jewish ethnostate doing genocide anymore, so then it wouldn’t be Israel anymore. It could just be Palestine with everybody living in it.

America’s really big though so there would be land given back to lots of indigenous groups, possibly breaking up into smaller countries, etc.