Taiwan also has a last resort nuclear weapons cache. Surface to surface and air to ground. Taiwan did not develop these themselves they were procured.
Most believe they were procured from Israel. Though others believe Israel was a conduit for US-supplied nuclear weapons for Taiwan.
Either way, they have the last resort firepower to make Communist China think twice before attempting any invasion. It is that deterrence that has kept Communist China at bay for all the decades.
MacArthur thought he would get help on Bataan too. Now, with our ships in port half the nation locked down and struggling. It would be the best time for Red China to attack. It would take weeks to gather forces to help Taiwan. If they came in swiftly and with great savageness the “Rebels” could only last days and fold up in a week. They Chinese would have help from their bought and paid for political people, the media and Hollywood. It would have to be well planned and quick. They would need a ‘fifth Column’ inside Taiwan to make it work. This would get the people of China distracted from the virus.
Any invasion would have to be by air, since a majority of the coast is too difficult for any amphib landing.