from personal experience (born in Germany, lived in several EU countries, spent some time in the US), no. There are conspiracy theories that are somewhat equivalent to QAnon in spirit like the "Reichsbürger" one in Germany which asserts that the state really is some sort of corporation owned by Jews or the US or something along these lines and it has a modest following, but it is completely outside of civil society.

The US seems relatively unique mostly because it doesn't have any legal or information infrastructure to battle these sorts of misinformation. As soon as conspiracy-theories venture into anti-semitism or hate (as they regularly do), there exist legal tools to shut them down in Europe, and there is a healthy public news/broadcasting infrastructure in most countries that manages to keep a common reality intact.