openSUSE has all their tooling based in EU ground. For example, OBS that is the build service, has the machines around Germany or Prague. A big bulk of the community is EU based, (with very relevant contributors from many other places), and SUSE, the company that is helping (via infra and some packages) is from Germany.
I do not known if sovereignty makes sense in the open source world, as at the end is a joint effort of multiple developers from many (and some times confronted) places, but if it does make sense then I would value more those other criteria.