Kind of, but I don't think this is strictly limited to the US. All languages are probably affected to degrees proportionate to language and culture compatibilities with the US English. If your ideas about left and right politics are the ones built up from first principle that isn't well correlated and connected with the orthodox interpretations, both sides will be nonsensical to one another, and that shields such bubbles from ... the massive negativity being poured into the platform, for example.
edit: since this is under a dead comment that might not bother too many: I'm suspecting that there must be two competing hypothesis inside the org that owns Twitter, one being more preferable than the other depending on where one is coming from, that users still remaining on the platform and active on it must be either A) appreciative of ultra right turn of the platform with increasingly dominant right wing ragemaxxing contents, or, B) they just exist as a colossal autonomous parasitic self-contained isolate hivemind that had always been at least equally influential as the host but now is also physically bigger and therefore more influential than what its owners consider the host.
Frankly, I find the Malfoy trend that was going on couple weeks ago to be highly sus, that it smelled like an artificial boosting campaign to map out political leanings of user clusters which has to be right leaning from the hypothesis A. It makes sense as to me as one, given my unique knowledge of political controversies surrounding Harry Potter and ... opinions expressed by its author JK Rowling, which absolutely everybody here knows about. And I'm imagining that, if it had been such an experiment, it must have been horrifying to watch the Potter villain simply accepted as completely non-controversial wholesome pro-LGBT pro-gay left-to-center content among the most influential and knowledgeable and skilled of Twitter users like nothing had happened since 2016 or so, supporting the undesirable hypothesis B, although that seems to have always been the reality to me.