Greetings!
I am a relatively new MediaWiki extension developer,
I know we can use action=query&prop=extlinks to get external links from our wiki page to other (non-wiki) web pages, action=query&prop=links to get internal links from our wiki page out to other wiki pages, and action=query&prop=backlinks to get internal links from other wiki pages into our wiki page.
However, in the case where a link is external but points to an internal wiki page, I can't find the proper API call. These links seem to be falling through the cracks somehow.