The US can't even make a smartphone any more. Or electrical distribution equipment. Or telephone central offices. Or TV sets. Next to go, cars. (Chrysler just exited the car business. Minivans only now.)
Has the US ever made one in the first place? IIRC Apple had to go to China for the first iPhone, were there any brands that could do it all in the US?
It was a short-lived experiment. Motorola was sold to Lenovo, and the plant shut down, within a few years.
[0] https://www.theverge.com/2013/9/11/4717796/made-in-america-a...
That kind of assembly could be totally automated. Pick and place to make the boards, stack and rivet to put it together.
Modern phones have little pieces and wires all over the place.[1] You'd think these things would be designed for automated assembly, but they're not.
[1] https://www.iphoneincanada.ca/2020/11/15/part-2-ifixit-iphon...