It doesn't. I don't really believe this meme of the center-left and left in the US being the mainstream in the EU. It's true that certain attitudes around labor and economics are shared between the American left and more center left and center EU parties, but our stances on social issues are completely different. There's an entire fabric of multiculturalism that's present in the US that just isn't in the EU that has a very different lens. For example, the US just doesn't have anything resembling an EU-style Christian Democratic party from a social values perspective at all.

Bluesky is mostly about day-to-day American politics, which means talking about how a court ruling is bad, how Trump did something stupid, or how the current admin is corrupt. The complaint I've read from most EU folks is how American day-to-day politics takes up way too much of the site.

I was unable to turn off politics without pretty much completely nuking my feed. I tried using mute words but that ended up just turning off most of my timeline. I build a US Politics labeler that worked pretty well, but ended up in a similar effect. Content outside of the politics on the network just isn't very interesting. Pretty much none of my hobbies are well represented there except some photography, and the photography is mostly about sharing pictures (which is definitely cool) rather than talking about shooting weddings or events or street the way it tends to shake up in other photography communities.