Comparing Taiwan, which has been functionally independent of the PRC and under control of the ROC since 1945, to South Ossetia or Transnistria is absolutely ridiculous. Just because Taiwan isn't widely recognized by the international community doesn't mean that it isn't an entirely separate socioeconomic entity. A brief glance at the last two decades of politics in Taiwan will show you as much.

The UN is totally irrelevant here. Taiwan operates as an independent country in every practical way. (So does Hong Kong, kinda, but Taiwan even more so.)