US can't manufacture iPhones, but it can manufacture other things. That you can't build Versaille overnight doesn't mean you can't plant a few flowers and lay one square stone.
I think SPARC CPUs were manufactured in the USA even in 00s.
The whole re-industrialization idea is good, people making something know it's not magical and wonderful. That an ARM CPU in an iPhone is a relative of an MC in a toy, and that said MC's internal structure can be grasped in an evening.
Worker jobs in manufacture affect societies very well. Just believing that this is going to happen means believing yet another US administration promising something until its term ends.