Rather Chinese nationalism is still very much alive and well in Taiwan
Only a small minority identify themselves as “Chinese not Taiwanese” nowadays. According to the latest public surveys (News article, Survey source, has English in the graphs), only 2.4% think that way (declining), 61% identify as Taiwanese (rising), and 32% as both (declining). And then you compare it to the unify-indipendence survey and see that a combined 60% still prefer the status quo, with independence behind at 25%, and unify at 10%. KMT may still have a large voter base in TW, but Chinese nationalism isn’t the only reason people vote for them. You would want to look at 中華統一促進黨 for true Chinese nationalism and PRC sympathisers.