Linux computer maker System76 is moving manufacturing from China to the US. They will start with desktop computers first to learn how to do it then move on to laptops, so this is a multi year process.
https://opensource.com/article/18/4/system76-us-manufacturing-plant1. Hopefully this is the first very tiny step in a larger trend.
2. Although this has been in planning for years, it's probably a good idea given the deterioration of relations between China and the US.
3. I suspect they will automate the manufacturing as much as possible.
For System76 this seems like a part of a larger strategy. The company used to use Linux Ubuntu exclusively but has recently launched their own flavor of Linux called Pop!_OS. They seem to want to take more control of their upstream sources. I suspect the goal is to quietly become a third brand in computer hardware and operating systems.