> There are hundreds of foreign owned and operated factories in America that are run like independent kingdoms, staffed with people from other countries with their own restaurants and dorms so the workers are never exposed to the outside world,

That doesn't make it ok, does it? What you're describing sounds a lot like the conditions that migrant workers in Qatar and Saudi Arabia are working in.

The US shouldn't tolerate such conditions for workers in factories on its soil, no matter who operates them and where the workers are from.

In fact, no country caring about human rights should. I'm from Germany and in the early Covid phase in 2020 it became clear that there are a lot of east European workers in our slaughterhouses, with them living in very tightly packed quarters (for which they had to pay exaggerated prices to their employers) leading to a massive spread of the disease. At the time, many politicians cried that something will have to change, but of course nothing happened and the whole thing was forgotten as quickly as it had come to light.