Are you arguing that Twitter is right wing because it is US-centric, and not because of Musk’s leveraged buyout?
I would argue that US social media platforms are (now) right wing because of aggressive financial attacks meant to break up open social engagement, as this is bad for business and sociopaths looking to exploit people for profit. Reddit was left wing, until it was bought and sold. Same with Twitter.
However my comment was merely rejecting the idea that Lemmy is left wing because it is not US-centric. Lemmy was started by tankies, who say they’re left wing and have some left wing ideologies, but really they’re more authoritarian fascists, and fascism is in fact right wing. However as Lemmy grew it became apparent that this stance would impede its growth - particularly in western markets - so the main devs have tried to minimise their political views and keep the program neutral; now those views are primarily concentrated at lemmygrad.
Lemmy is not US-centric, but that’s not why it’s left wing. Lemmy is left wing because rational empathetic thought is naturally left wing. Lemmy is full of communism because it was started by communists/tankies.