Ford actually makes vehicles in Europe. Does BYD?

If push comes to shove and Europe needs to part ways with the USA, to greater or lesser degree, there will still be machinists, mechanics, and actual facilities in place to keep making Fords. That is a positive from the standpoint of European sovereignty.

The EU probably has rules in place to strongly encourage US manufacturers of automobiles to put facilities in the EU. The US has similar rules and many Toyotas, Hondas, &c, are made in the US, using US suppliers for parts.

It's not hard to imagine an approach to digital services that trends in a similar direction. In the EU or Canada, the US parent company would supply technical data, software, specifications, &c, to a domestic company with its own facilities and operations. It probably requires a combination of regulations and regular stress tests; but nothing prevents the domestic company's operations from being as de facto severable as a car factory.