Google has offices in almost every countries but they are administrative offices with almost no employees. If you're a tech worker, you can only be in one of the very few tech locations.
They do have tech workers in multiple locations in Germany. At least one of them is almost only tech, but small.
But you are right, that those are not big major tech offices like the three mentioned. So most engineers in Europe would still be working out of London, Zurich or Dublin.
Google has offices in almost every countries but they are administrative offices with almost no employees. If you're a tech worker, you can only be in one of the very few tech locations.