Its going to be a very long time before it changes enough to do without US tech. How many European governments are encouraging the use of apps that only run on iOS and Android? How many critically important businesses like banks require customers run unrooted Android or IOS? HSBC's app will not even work if you install apps from F-Droid!

Step by step. For example, most Dutch banking apps work fine on GrapheneOS. Yes, still with Google Play Services, but at least they are sandboxed. It shows that there is a path to removing dependence incrementally. There are also a bunch of European phone brands (yes, most manufactured in China), like Nothing, Fairphone, Gigaset, HMD, etc. and at least one of them already supports alternative Android versions. Yes, I know they have issues, but you need to start somewhere.

Its good your university is trying, but that sounds like a limited response. Do they use Windows? MS Teams? Google Drive?

Yes, but they also have an official Linux workplace, last time I was there, you could choose to re-image a machine to run Linux on every machine. They are also trialing ownCloud.

The migration won't happen overnight, but it's good that they are setting up the alternatives, trialing them with small user groups, etc. It's the best way to prepare yourself.

I know of no government making serious attempts to get the private sector of US dependence. Just check how many things you use regularly run on AWS. Desktop Linux is great but is any government actually making consistent attempts to persuade businesses to switch to it?

I agree, not enough persuasion is done. But being gloomy is not going to help. Best is to trust in our own strength (we can do it), accept that the solutions are going to be worse (at least initially), make people aware of the risks and alternatives.

The whole situation sucks, but big changes also give rise to big opportunities and it is an opportunity to change to a more open, more privacy-friendly, more user-oriented, etc. ecosystem.