I don't believe TSMC will finish building the 5nm Fab in the US, jezzzz $12B and easily will go up to $20B and the cost of product 5x than the one produce in Taiwan
Who will buy the chips produce there?, definitely not China .. who else?
Again, it is about demand & supply. As long as the demand exceed the supply somebody will buy the chips produced there; they will be the late comers. AMD, Apple & Qualcomm could be among them.