FWIW, the U.S. actually is still one of the top manufacturing nations in the world, coming in at #2 behind China in a country-to-country comparison and number three if one considers the European Union as a single entity. The U.S. accounts for around 16-18% of global manufacturing:
https://www.weforum.org/agenda/2020/02/countries-manufacturing-trade-exports-economics/
You will not generally find low margin products like toys, plastic dishware, consumer electronics, etc...manufactured in the U.S., so the vast majority of things you will find in say a Target or Wal-Mart will be foreign made. But there is a whole underground world of industrial components and products that undergird the functioning of the economy and society that are made here. Manufacturing has shrank as a portion of the overall U.S. economy over the years, as there are other industries that have grown as well.
That said, manufacturing has been hurt in this country over the past decades by open trade policies that allowed for our competitors to have free trade with us but we still have to deal with protectionism with them (ex. China). Don't get me wrong, I am all for free trade, but it only works if other countries are not engaging in protectionism and subsidies for their own industries. Shipbuilding is a prime example. Many countries for years subsidized their shipbuilding industries, but the U.S. ceased this practice in 1981, which made it very difficult for our shipbuilding industry to continue to compete.
