That's a weird way to frame a truly free speech environment. Yes, speech is more limited to left-leaning speech on most accepted parts of the internet. That doesn't make a board that allows both to be right-leaning. It means that most of the internet is left-leaning.
Ofc, im simplifying to left vs right here, but that's only in response to calling it a right leaning board.
Truly free, as in no limitation. I would include doxing, slander, and defamation to fall under "truly free speech", yes. That it not me advocating for these things, it is me calling limiting them what it is: limiting speech. We limit them because they can be very dangerous or destructive, not because they aren't speech.
Ofc, im simplifying to left vs right here, but that's only in response to calling it a right leaning board.