Aha, I think this restore feature is missing from the standard Lemmy UI.
Maybe this will help: I quickly implemented a very basic restore button on lemmy-ui-next. Can you check if you see a “Restore” button in the sidebar at next.lemm.ee/c/eurographicnovels? Note that you must be logged in as a moderator to see this button.
I need to step away from my computer for a while, but if this doesn’t work, then I will be able to look into it further during the weekend.