Here’s the job ad, maybe now the questions make a bit more sense: https://tw.forumosa.com/t/full-time-customer-service-role-in-malaysia/173214
@zayc, may I please respectfully nitpick a bit?
As mentioned by others, to hire “Native Taiwanese” has a very specific meaning here. It most commonly refers to the Aboriginal tribes, and thus unfortunately only a small fraction of the population is considered native. Depending on which aspect you mean to stress by that requirement (passport, language, cultural background, upbringing, …), you might want to consider using other terms like “Taiwan citizen”.
“Fluent English, native Taiwanese”: Taiwanese in this context refers to a language or dialect also called min Nan, southern min, or if I’m not mistaken sometimes hokkien. https://en.m.wikipedia.org/wiki/Southern_Min Many people here speak Taiwanese (note: many native Taiwanese = Aboriginal don’t), but it’s not the main everyday language for most: that would be Mandarin Chinese.
If you mean to Target native Mandarin speakers, perhaps ask for Mandarin. In case you want these customer service employees to care for Taiwan customers, I feel Mandarin is necessary, while Taiwanese would be only a slight advantage.