A lot of these US vendors have data centers in the EU operating under EU law via legal entities in the EU. So, it's not all that black and white. And there are a growing amount of EU based alternatives.

And just to make a counter point, there are also US dependencies on the EU for some things as well. Mobile infrastructure is a good example; mostly comes from Nokia and Ericsson. What was left of US based network equipment makers was merged and acquired in the early 2000s. For example Bell Labs is currently owned by Nokia. It includes bits and bobs that once belonged to companies like Lucent and Motorola.

Another dependency is shipping; the US has very few ship yards left and is looking increasingly to the EU for things like icebreakers and some navy ships. Likewise, ASML the industry leader when it comes to making lithography machines used in chip making is based in the EU as well. And of course a lot of manufacturing uses machines made in e.g. Germany.

IMHO this mutual interdependence is actually a good thing. It stimulates maintaining peaceful relations and engaging in trade. We could use a little more of that. Isolationism didn't lead to anything good last century either.