Nearly all that stuff had been given to the Afghan Army (over 20 years), and the US wasnt getting it back anyway.
And it was almost all equipment specific to counterinsurgency. The US has been giving that stuff away, like the MRAPs from Iraq.
A Taiwan war will go fast. It will be fought with weapons in service and in stock. No “arsenal of democracy” stuff here. And soon, apparently. If anything is not here, now, its irrelevant.
China can wreck Taiwan until Taiwan begs to be taken.
It would be quite costly for China to attempt an amphibious landing across the Straits of Formosa; but China-based airpower will keep the US from doing much about it.