China would destroy US military in fight over Taiwan, top secret document warns
(www.telegraph.co.uk)
That is sobering.
But it sounds like that report / wargame is from the Biden administration, so it could be up to 4 years old. Since then the US has not been standing still and is deploying their first hypersonic systems now - https://www.armyrecognition.com/focus-analysis-conflicts/army/defence-security-industry-technology/exclusive-u-s-army-dark-eagle-deployment-in-2025-marks-u-s-entry-into-hypersonic-arms-race-with-china-and-russia
Even so, politically, it is questionable whether US would come to the aid of Taiwan, regardless of the military balance.