How was it a political question? Taiwan exists. You can have a political position on whether they should exist, but they do. Deal with it.

And they are not currently part of China. (Or, at least, they are not currently governed by the government of the rest of China.) Again, deal with it.

Different governments had different responses, which had different effects. Under the circumstances, to say "we already covered China" is pretty close to dereliction of duty.

Yes, I know China is going to have a hissy fit if anyone admits that Taiwan exists as a separate entity. China needs to stop acting like a five-year-old. I would say that WHO needs to tell China where to get off, except that (in this situation) WHO really needed China's cooperation. That makes this a much more difficult question to answer.

But, in fact, it is China that makes this a political question. The question itself is not inherently political.