TBH I don't think "legitimacy" matters. They function as an independent country. They issue passports, and flights between them and the mainland function as international flights despite both countries making up legal mumbo jumbo that calls it "cross-strait travel". There are countries with more widespread "legitimate" recognition that are functionally less of a nationstate than Taiwan.
Yes, yes I am.
TBH I don't think "legitimacy" matters. They function as an independent country. They issue passports, and flights between them and the mainland function as international flights despite both countries making up legal mumbo jumbo that calls it "cross-strait travel". There are countries with more widespread "legitimate" recognition that are functionally less of a nationstate than Taiwan.