Unfortunately for the US the decision flowchart for Taiwan is simple.The danger here is that when the CCP does make a move on Taiwan, Baiden et al will over react to try to make up for their shit show in Afghanistan.
The first decision box is:
Are we willing to exchange nuclear weapons with China to defend Taiwan?
Of course, the answer is No. Simple.
That doesn't mean we can't arm Taiwan to the eyeballs, supply satellite data products, supply intel and advisors. All of that delays China for 2 weeks. The adult reality is that it is futile.