Only way that jumps to mind is it's possible to enter blank characters (alt codes) that could make it look like it is just Q but in fact is "QXX" X being blank char. unless the devs disabled this, which they normally would do.

What stands out for me is that the Q account hasn't been removed, it would surely give ammo to lamestream media to discredit truth social and if it wasn't legit would have been nuked already