All submissions need to be moderated (unless the author has raised privileges). This includes checking the tags, references, text, and the actual release. If something is missing, if the contributions violates our values, or if it’s just not suited as extension for LibreOffice, the moderation may result in an archived state. That means the extension wont be visible on the site but you can restore it. If you feel this decision was not justified you are welcome to discuss here. The same is true if an extension has been published illegitimately or is outdated and not maintained.