@rachel-statsnz – The settings you’re looking at there specify pages where the Unanswered link won’t be shown in the menu – not pages to exclude from Unanswered status.
When I set this up, I also wanted to exclude certain informational topics from the Unanswered list. My workaround is to post one reply, e.g. “This informational topic is not open for comments.” – before locking the topic. For your wiki topics, a comment inviting people to edit the wiki would serve to exclude the topic from Unanswered.