What does it even mean to "get updates from China"?
Software these days is distributed and globalized in virtually every sense. Polestar is headquartered in Sweden and much of their software development is in the UK.
There are no concrete guidelines or rules as this article illustrates.
It means that Polestar's ultimate owner is a state-aligned Chinese conglomerate.
The devs, in the UK or not, will do what it tells them to do.