The stated reason for delaying the fab construction is a lack of skilled labor in the USA, which does make sense - that's what happens when you hollow out domestic manufacturing in the name of increased corporate profits from outsourcing.

> "“There is an insufficient amount of skilled workers” with the expertise to build a chip factory, TSMC chairman Mark Liu complained during a call with analysts. The executive warned the company might have to fly in “experienced technicians from Taiwan to train the local skilled workers for a short period of time.”"

https://fortune.com/2023/07/21/tsmc-complains-cant-find-enou...