Airbus was never born as a European giant. It was a merging of many national champions (Aérospatiale, DASA and CASA) that were each already making full airplanes. They figured out how to spread out the manufacturing later.
Airbus currently has two factories finalizing the airplane assembly: one in Toulouse and one in Hamburg. You could copy this model and just open different fab in different countries to spread production.
Also, another model is one country making wafers, one country making EUV-lithography machines and parts, one country mining and refining silicon, etc.
There's no "one country making lithography machines". The mirrors come from Germany already. Other parts from about 160 other countries around the world. The EUV tech itself is an American invention and was picked up by ASML. That is why USA has the say in who gets it.
Fabs are so expensive and profit from local knowlage. 2 full leading node fabs seems optimistic.