Not reallyProductivity is output per hour and in typical American fashion, technological advancements and innovation mean that the U.S. can produce substantially more per unit labor hour than anyone else. Improvements at the intensive margin of work hours are fools gold (with all kinds of other deleterious effects elsewhere); extensive margin improvements are far more desirable
The TSMC fab is run by Taiwanese engineers. Their productivity matches the main fab in Taiwan due to that fact, not due to supposed Americans productivity.
If TSMC didn't build a fab, the Americans couldn't be able to make 7 nm or below and would have not productivity advantage.
So this is not a sign of strength rather weakness as the Americans can't do to themselves and had to get outside help to teach them. This fab represents TSMC productivity not Americans productivity. Actually reveals the weakness in Americans domestic chip production and lack of technological advancement that they don't have a domestic foundary able to compete with TSMC.