It's not just about avoiding the US out of anger; it's more about preventing US companies from having too much control over their citizens and daily lives. By focusing on open-source solutions, whether American or not, it should serves their purpose. They can move all packages to a EU server, and manage it more directly this way
Thats what I belive but im no expert especially on the law, but I dont see an issue with US opensource unless the EU straight up penalizing any technology thats developed in the US, which Id doubt they would do.