I think there are plenty of engineers in Europe and Germany to find. Europe has a healthy semiconductor industry, just not so many fabs. And why wouldn't a lot of people want to move to Germany? Considering how many of my colleagues have moved to Germany for the job, I don't see a special obstacle there.

Also: wherever they build their new fab, if it is outside of Taiwan, they probably have attract the engineers to move there, which place would be better suited at the moment?