This is mostly a northern-Europe thing. Netherlands is probably the most bike-friendly country in the world, even as a pedestrian you have to be careful because they WILL NOT slow down if you're in their lane
As soon as you cross the imaginary dutch-speaking/french-speaking border in Belgium there's much less space dedicated to bikes, going towards the South of the continent. As some breh said the fact that the land is flat as hell helps a lot (that's basically the name of the country). Obviously in cities like Lisbon or Italian cities that go up and down hills and whatnot the bike culture has less developped and it's even probably more convenient to just walk.
Yep I went from Amsterdam to Belgium, big difference.
I don't think I remember seeing any bikes in Belgium to be honest.
Also interestingly, I took an uber in Belgium and was talking to the driver, I told him I love belgium beer, he asked which ones, I told him my favorites.
He said oh we don't like those and some he never hear of, then I asked what do you guys drink here and he told me the most popular one there. He told me, and it's true I saw ads of it everywhere. Don't remember the name but I tried it and it tasted like water. That was shoking to me, belgium beers are awesome but the most popular beer in beligum tastes like water????
Also when I was in Amsterdam I asked about the crime because while I was there I did not hear one police siren.
People said the worst crime right now is bicycle theft, and there's this one guy steaking bicycles and they are trying to find him
One guy told me he thinks the name of the thief is Dael