You shouldn't just evaluate governments based on reported approval, but approval does mean something. I don't think you have provided sufficient evidence to be able to dismiss the data.
I don't think my comparison to France is as shocking as you claim, but perhaps a better comparison would be Canada's treatment of indigenous people. I thought this video on the topic of Xinjiang was pretty good: https://www.youtube.com/watch?v=cz9ICFDk8Js
My understanding is that--according to Western sources--Chinese people report high satisfaction with their government, much higher than US citizens. I feel that this metric should also be considered when evaluating the quality of life in a society.
As for the point on Xinjiang, I think the oppression of people there is real, but oppression of religious minorities isn't just a non-Western phenomenon; look at France, for example.
Consider the source of your information about other societies. The elites of Western society, who have a great interest in preserving Western societies as they are and who hold a lot of control of the media, want to align the populous against the enemies of the Western elites. The flaws of enemy countries will therefore tend to be exaggerated, sometimes highly so. Western societies will tend to be portrayed as the best anyone can hope for.
I don't think my comparison to France is as shocking as you claim, but perhaps a better comparison would be Canada's treatment of indigenous people. I thought this video on the topic of Xinjiang was pretty good: https://www.youtube.com/watch?v=cz9ICFDk8Js
Edit: About France, here's an article on the topic I was referring to: <https://theintercept.com/2019/02/23/france-islamophobia-isla...>. A quote: "[France] has become a 'laboratory' for discriminatory laws targeting minorities, particularly Muslims."