Taiwan isn’t exactly a rogue province. It’s the holdover of the prior government of China that lost the revolutionary war and retreated there.
It doesn’t entirely invalidate the point, but it has to be said that the situation is markedly different from the one with Texas.
It’s more like if Texas overthrew the US government in a violent rebellion and the UK worked to support the holdover of the old US government that retreated to Puerto Rico.
Nothing that happened since has invalidated truly the right of Taiwan to remain a sovereign state. It’s in no sense a rogue province.
“Taiwan never has been a sovereign state”
I guess the Republic of China never existed?