Focus instead on enforcing standards' compliance so i can open a .docx with any program and be usable anywhere.
Then focus on enforcing FOSS software in public services but don't bother with a "european linux distro", that's just a waste of resources. There are already a great deal of distros around. Considering geopolitics i'd go with SuSe or some other EU-based distro.
Yes MS intentionally implements it inconsistently and yes that's why i meant whichever format is open.