Creating domestic jobs this way doesn't have a great track record however. They are usually quite expensive. And they don't help the geopolitical uncertainty at all, which is at least hinted at being something of an end goal.
Sure, you can ship parts all over the phone and have assembly in the final country. But what does that solve? What people usually think of when discussing where products are "produced", the components or at least a majority thereof, is the same.
Where do you source OLED screens in necessary quantity to produce a popular mobile phone model in the US, or any other Western country? Or the batteries? It's not a question of cost. It a question of non-existence.
Changing global production is a not a singular problem but something that would require laser focus during several decades and many different areas just to be something that could be taken seriously.