Eruvin in other countries

I was super excited to learn that the Czech Republic is so Jewish and Israeli friendly. I’ve started learning the language again and plan on visiting. But I saw there was no eruv in Prague. Curious, I looked up other countries, especially in the EU. I really would have thought Paris would have one. Or Berlin. Aren’t there a lot of Jews in France, despite the political climate? Mexico City has an eruv, for example. So does Venice and Moscow. I really would have figured more major cities in the EU would have them, at least in France where my understanding is there’s a sizeable Sephardi community. Obviously the Shoah and its ongoing trauma and aftermath are primarily why. But… Are there other reasons? Do local governments block it? Am I overestimating the Jewish populations in France, Germany, etc.?