I think this is the case, yes. From my pov the technical ability to block others and defederate leads to this left leaning trend. This is the only place I know that is really left leaning.
But the important part here is: the distinction between left and right is arbitrary. There is no left and right. There are certain beliefs and ideas which usually get attributed towards left or right.
The idea of freedom - in most of the world - isnt really left or right, or at least used to be.
Especially the fascist turn of the us, the fascist turn of germany and others are a sign of the world turning, not lemmy.
Because freedom, flow of ideas and identity are still typical topics on lemmy. Same as they used to be. I think the right wing nuts just left since they are more welcome on xitter and fascbook.
Is that good for critical discourse? No. Can we change it? No idea. Should we change it? No idea.