Issue: Display search results by relevance.

From what I can tell, default XenForo has relevance-based searches disabled. However, if you have an add-on installed which provides a SourceHandler that supports relevance, then XenForo will perform relevance-based searches. VaultWiki's search templates already have the relevance option when XenForo provides the standard $supportsRelevance viewParam.

We already offer relevance-based searching in vBulletin 3&4.

I am using xenforo enhanced search. (elastic Search) Im not sure if that makes any difference. Please see the bottom of my search page.

When I am visiting your search page /search/, there is a relevance option available. From there, it is also available on the tabs to search Wiki Pages or Wiki Discussions. So it looks like your site confirms that this is already available. Perhaps when you opened this request you weren't using Enhanced Search yet.