My tour guide on holiday is a Miao woman. She was impressed by my kid’s multilingualism. “Surely Miao kids are bilingual?” my wife asked. “No, kids rarely speak their minority languages these days, only Mandarin.” She wasn’t being political about it, just casually said it like it should be obvious.
The Miao were once the most rebellious group in China, so much so that Uyghurs (!) were once sent to put down one of their uprisings. They fought the Ming and the Qing multiple times to resist forced assimilation. Clearly they have now given up on that.
And despite this, they are still not considered Han and therefore are not thought of as really Chinese but Han ethnonationalists.