The Republic of China (aka Taiwan) had never any interests in effectively and finally surrendering to the communists on the mainland.
The "threat of invasion" has been the case since 1949. The communists stopped and did not 'finish the job' because it was hard, because of a deal with the Nationalists, because they got distracted in Korea, whatever other plausible reasons. This has been the situation since.
Interestingly this does not mean that the people, especially pro-KMT, are necessarily 'pro-US'. Those people are rooting for China but not for the communists and see the US as a necessary 'evil', so to speak.
The "threat of invasion" has been the case since 1949. The communists stopped and did not 'finish the job' because it was hard, because of a deal with the Nationalists, because they got distracted in Korea, whatever other plausible reasons. This has been the situation since.
Interestingly this does not mean that the people, especially pro-KMT, are necessarily 'pro-US'. Those people are rooting for China but not for the communists and see the US as a necessary 'evil', so to speak.