Even Zenz and associated media don’t claim there are millions. And yes, even if you add them it still looks much better than US.
> Since 2017, up to 1.8 million Uighurs, Kazaks, and other Turkic minority groups in the northwestern Chinese region of Xinjiang have been swept up in what is probably the largest incarceration of an ethnoreligious minority since the Holocaust.
(Or course this about largest incarceration is bullshit too, but hey, he needs to be making money somehow, right?)