Why is there such a large amount of communist and transgender related posts on the Fediverse compared to other platforms?

because the fediverse is a place where the admins choose to federate with whoever they want and get to choose what are the policies in their own instances. so you got a chance to stop the hatred and harrasment trans people are victim of on other social plateform where the company don't want to dive into "political" stuff

it's kind of a safe space online for trans and lgbt for that reason