I think the important part is about who is running the server, rather than who made the software

The fediverse is interesting in that context because each instance can decide where they set up the infrastructure or how they process data / requests. The same applies to self hosting

I saw an article that outlined which country each fediverse platform "originated" from, such as Canada for Pixelfed and Germany for Mastodon. That's fun to know about, but otherwise not important to users compared to the instances themselves

At most it might speak to which laws will govern the project itself, but even then someone can fork a project that goes astray

People should pay for foss. Donations are oftentimes welcome

I mean, any FOSS project from anywhere could be being used by a fascist government or corporation, to be fair. That's literally one of the very serious and real downsides of FOSS. It's able to be used for good or ill.

I mean, it can easily be argued that the US corporate technology class has benefited far more from FOSS than end-users worldwide.

Amazon's EC2 especially:

Initially, EC2 used Xen virtualization exclusively. However, on November 6, 2017, Amazon announced the new C5 family of instances that were based on a custom architecture around the KVM hypervisor, called Nitro.

Amazon leveraged FOSS to create their own successful closed-source offshoot. AWS pretty much runs the web. Amazon... is not a good company.

That being said, the US has chosen to be isolationist, whether all of its citizens agree with it or not. Having less of a presence on the international stage, including in the FOSS world, is simply a consequence of isolationism. So boycotting US FOSS is likely to happen in some ways on purpose, and in some ways just from diminished international respect and involvement.