This very subjective and probably different person to person especially given AI driven filters and the ability to choose who to follow or friend on these sites.
When I check one of the sites you mentioned, I see almost exclusively voices from the American right-wing. On the other one, it's significantly more moderate but with some opposing viewpoints from either extreme thrown in. It all depends on who someone friends or follows and what the filter chooses to show.
Of course, this ignores what "liberal bias" is, which is a subjective determination that varies according to the bias of whomever makes such a determination.
Although, this is a distraction from the question raised early in this thread. of whether some coordination happened behind the scenes or if these bans are a result of distinct actions in response to the same circumstances.