What other countries? England? Germany? France? The industrial center has moved to China.

There are plenty of other countries with decent levels of industrial manufacturing in the global south. India, Brazil, Russia, Vietnam come immediately to mind. But that's besides the point, since by the time that the US collapses, more global south countries will join the ranks of moderately/highly industrialized countries.

It won’t be called America

Well, uh, the thing that comes after America would be helped by the rest of the world. America would be gone, but the land and the people won't be.