"Reunification" would only be even in the realm of possibility of a correct term if the KMT took control of PRC territory. Since the CPC has never ruled Taiwan, it's nonsensical to say unify or reunify.
In any case that's impossible, the kmt government that once ruled is gone. It's been replaced by a government that held the name but is Democratic, and the KMT party has been losing power ever since then. The people have clearly decided to detach themselves from that way of doing things.
Furthermore, given the identities of the people in the PRC and Taiwan, any term involving "unify" is just engaging in cultural propaganda. The taiwanese identify as taiwanese, and lately as distinctly anti-chinese (binary oppositional development is an important sociological concept, see the difference between femininity and masculinity in many cultures, or, the French vs the English cultural identities), the PRC people identify as chinese, these cultures and preference for forms of governance are too different to "unify."
If one government rules both of these people anytime soon it will have been imperialism, plain and simple.
"China" died at the end of the Qing dynasty imo, since then it's just been a couple han supremacist governments weaponizing the term to leverage nationalist sentiment. There's no more Chinese nationalism in Taiwan so it won't work here anymore (despite even older taiwanese government officials blundering around with han supremacist presumptions even today). I think it's still working in the PRC and that's why they're allowed to do cultural genocide there without much pushback from their citizens.