There is an almighty set of confusions in the term “Europe” - and pray we stay away from the Politics!
The Netherlands are in the EU and XE.
Norway and Switzerland are only in the XE.
The UK is about to get nicely confusing as it is about to stop being in the EU and only be in XE.
That UK case has already caused enough argument as UK releases are usually XE releases too. Except when they aren’t. (Mad little island that we are - Lolz)
When/if UK eventually drags itself through leaving the EU the MB database needs to watch out in case some political loon starts trying to “correct” the EU\UK entries.
A 1990s disc stamped “made in the EU” could be in Swindon, UK or Uden, Netherlands… or sometimes both.
Parts of Russia are in XE and other parts in Asia but never EU.
Turkey is in EU, XE and Asia.
See - clear as mud.
Now back to the OP. I would have thought it should be possible to teach Picard with a magic script to change your tags to how you want them. Should be a simple swap to change XE to EU on your files. I just don’t yet fully understand the magic tagging pixies and their rules. Hopefully someone will see this thread who is a Picard tagging expert and write a little substitution script.