Tibet is mentioned to be independent. So we can add Xinjiang and Catalonia to the list?
Could be, although with the whole "mega swarms in Central Asia" and the fact that Kashgar (mentioned as 'Kashi') was a gateway for Chinese citizens fleeing to the west by land means that things could go pear-shaped. Doesn't mean the Uyghurs won't be independent though.
It would be interesting if there are stories of them working together with the nearby Tibetans to survive.
About Catalonia.....can Barcelona be isolated?
On the other hand, I feel like regions such as Aceh in Indonesia (less population density, having mountains and highlands, history of tough resistance to the outsiders), Kabylia in Algeria (the Kabyle Berbers are tough, and if the Algerian govt. screwed things up enough...), and Chechnya (depending on the events surrounding the Russian border control efforts, I guess) would be fit.
I've also read a scenario where Sicily seceded from Italy due to the perceived neglect by the central government holding up in the north during the war, so.....that.