Yes! What you're talking about is the content moderation, so if you post something on Facebook, there's a chance it could be taken down if someone reports it or if their AI moderation doesn't like it. You can appeal that decision and I've heard people have varying degrees of luck.
I think this week Meta announced that they are going to let go of their content moderation teams... so, ah, be interesting to see how that plays out.
With my website being banned by Meta - I can't even post in the first place. Any post with a link just won't post until I remove the link. As far as I can tell, there is no mechanism to appeal this.
Sorry, with Mastodon, I just meant I want to put some time into understanding how it all works. I have a Mastodon account that I post on extremely infrequently, but I do want to understand how all the servers link together, etc.
I remember looking into Fediverse with Diaspora (and should really look again because Nextcloud has those capabilities as well but I haven't had any need to activate them yet), I remember it being interesting but nothing else XD Worth looking into if you're interested in that kind of thing.
Best way to learn might be spinning up an instance if you're game ;D