One of the many ways in which I think "healthy community moderation" is not really being taken seriously by anyone: the canonical way to design a "you are banned" screen is to simply tell people they are banned without any meaningful information, explanation, option for appeal, nothing.
An actually well-considered ban screen might look something more like: "You have been banned from <thing> for <reason>. You can click this link to learn more about why we do not accept this sort of behaviour in our community, where you will also find a guide on different, healthier ways to deal with situations like this. Once you feel that you've understood the problem and can commit to doing better in the future, this (link) is where you can find the appeal instructions and the conditions for approval."
But I have literally never seen a single social platform, game, or anything else with a screen that even comes close to that.
@joepie91 funnily, the 4chan "you are banned" page is the one I can remember that is closest - as i remember it, it was something along the lines of "you are banned from X because of Y for Z amount of time, the rules can be found here, you can appeal your ban there"
@joepie91 Reddit comes close. A reply is to the ban message appears as an appeal in the moderator's UI.
@joepie91 maybe its because the ppl designing it are authoritarian leaning and they design it as a tool to live out their power fantasies and dont think so much about the ppl being banned and whether they shpuld earn about reasons, have access to appeal it, have multiple alowly escalating measures with the goal of rehabilitation... ...its probably more like the designers like to swing it.