There seem to be some ways where even an admin cannot undo a (potentially mistaken) moderator action.
For example, a mod can disagree with their own flagging of a post. In that case, the same mod cannot flag the post again. That process seems to permanently block the mod from flagging the post, no way to undo.
There’s Undo official warning too
Finally, it seems from my testing that if a mod chooses “agree” and “hide post” after flagging notification, the mod (even as admin) cannot change their mind and show the post again. There appears to be no function to unhide the post other than the original poster editing it.
Am I missing something?
mod-mode could help avoid
If it were possible for mods to log out of mod mode or similar have an extra step to take for a “sudo mode” type of thing, that could at least be an appropriate way to be extra careful around non-undoable actions. But, as a UX generality, extra blocks and warnings before taking permanent actions are still not as optimal as having working undo.