If a topic is in any way controversial, there’s a good chance it will get removed, when I’m sure the same content wouldn’t get removed on Reddit. I know it depends on subs and instances but I mean more generally, and for example AskLemmy vs AskReddit. Reddit seems to have more leeway for things, whereas Lemmy doesn’t and seems harder on censorship. Not only that but they remove things even when they’re not controversial such as when I just asked a question about savory fruit and sweet vegetables that got removed. They also give no reason at all for why things get removed nor any notice of its removal until you realise later. It happens so frequently that I wonder if this post will get removed too for some reason.
Typically the mod log will give a reason for the removal. The link to the mod log is in the footer if you’re using the web interface.