Fediverse

Nope. The protocol is way too public for shadowbanning.

You can be banned by other instances than your home instance, when that happens no new post/comment from you will federate to that instance in particular but the others still sees it as normal.

For example, I could ban you on my instance, and I wouldn't see anything from you ever again, but my instance would be the only instance to see that ban.

If you get banned from LW or lemmy.ml then a lot of people won't see you so that could definitely feel like a shadow ban, but there's nothing shadow about it you can see it in the mod log.

Instances can ban you without others being affected. Your comments could be visible on one instance and not on another, so there's a level of shadow banning going on.

Real shadow banning isn't implemented in Lemmy. It could be, but it'd only work for accounts on the same server. It'd also be pretty easy to detect, although the same also goes for other places that do effectively use shadow banning to fight trolls and bots. The people shadow banning works against aren't smart enough to verify that they haven't been caught in the first place.

why is there a blank post

Every action is public in the mod log so I don’t think shadow bans are possible although you might not know to check the mod logs in the moment

Just scroll down the page and search yourself

Technically every ban here is a shadow ban as you don't get notified for it.