People can and do talk about the Uighur in China, if you've paid any attention to the likes of the BBC they've been covering it every time some new information has come out, and in case you had your head in the sand, China were trying hard to stop the virus - the sealed of major population centres and had it quite under control until various western countries basically ignored the signs of what was going on and then didn't lock down, or even do basic screening for incoming nationals (the US was appalling for that, funnelling all their incoming nationals through one massively crowded airport where they were stuck together in conditions that made Comic Con look empty for in many cases 6-10 hours).
IIRC even BBC "Click" have covered the Urghur's, not to mention from memory a couple of long standalone specials, and the general news.
The reason Putin poisoning someone with a nerve agent makes headline news is that it's highly visible and he's done it before with no regard for national borders or who else gets hurt - it's a targeted political assassination done in front of the worlds media vs in a situation where it's hard to even get a hint of what's going on because it's deep inside a country that can and does control it's own media, let alone where foreign nationals and media go.
