I've been on Lemmy for about two months and there is a good amount of left-leaning folks here. I definitely consider myself in the left-wing category. I hover somewhere between a bit liberal, a bit socialist, and a bit of a commie, but absolutely no authoritarianism.
Funny you had to put a disclaimer for authoritarianism. The world's history and propaganda have made it synonymous with the far left, where that ideology was never about absolute power, but quite the opposite.