I tried working with a US vendor on assembling PCBs, and the soldering was incredibly sloppy. They repaired it for free, but it was a month delay when we didn't have a lot of time to spare. I gave them another chance and the next batch they did had a defect rate of 30% whereas our Chinese vendor's rate is <1%, so I bailed on them at that point.
I also tried working with US-based sheet metal vendors on making enclosures for my product, and it cost 6x as much as the Chinese competitors for drastically poorer quality.[0]
[0] https://mtlynch.io/retrospectives/2022/11/#with-metal-cases-...