Ok, two things here: Taiwan isn't a province of China - that's Chinese propaganda / wishful thinking. And the second: the phones sold in Taiwan and China weren't affected by the bad battery issue and there was no recall in these areas. So why is she talking about a replacement phone? Wouldn't be surprised at all if this were Chinese propaganda as well - China is known to bad-mouth foreign products to increase sales of domestic brands (Huawei etc)
Hard to say, the data was from the UN..... you'd think that the people at the UN knows geography better than anybody else.
https://www.unece.org/fileadmin/DAM/cefact/locode/tw.htm