OK, I understand.
I do not have knowledge on how this works (or is supposed to be working) in this setup.
The mod I linked is for jailbroken Sync3, but in fact even without jailbreaking it should work “mostly ok” with base Sync3 functionality. I would guess three things are needed to be configured for the station recognition to work ok: EU frequencies in general, RDS and the logs themselves. I am not sure, if your hardware supports RDS. You could look through link posted by F150Chief here: US Imported Vehicle Conversion for EU Station Logos