I've debated this in a few comment sections now. I feel like it probably goes to the community moderator. As far as I am aware there is no option to report a community on Lemmy besides making a post about in some meta community or messaging the moderators of the instance.

I've heard people say your instance admin decides if the post gets removed but that doesn't sound right to me. If I self-hosted an instance and reported it that would mean the report would bounce right back to me.

Would appreciate some input here for clarity.