As a “liberal” (American definition), you’re in a far different bubble than I am.

I'm an American, in my circles "liberal" is almost a curse word. It's what we tend to call people who support corporate power, profit motivation, and social progress as long as it doesn't inconvenience them personally.

We broadly use "leftist" to refer to ourselves, whether that's democratic socialists, anarchists, communists, syndicalists, unionists, etc. Philosophically, these folks are fundamentally pushing for wellbeing of all, social motivation, and social progress even if it inconveniences me personally.

I don't think it's helpful to refer to these differences in ideology as bubbles, though. I think there's a very real philosophical difference between liberals and leftists, and has been for generations. 60 years ago Phil Ochs sang "Love me I'm a liberal", and it wasn't a new idea back then. Liberals and leftists hold incompatible worldviews. Just like liberals and conservatives do. I think deploying the term "bubble" for such broad groups is probably more reductive than helpful.