Board Thread:Support Requests - Getting Technical/@comment-35289850-20200811214424/@comment-9605025-20200811222422

To clarify, Special:BrokenRedirects does not list redirects that are unused. It lists redirects that point to a non-existing page. So if you are going to remove pages listed at Special:BrokenRedirects, you may want to check to see if they are in use. If so, consider changing the links that point to them to the intended target. If you are interested in getting rid of these, then you may also want to check Special:DoubleRedirects. This lists redirects the point to another redirect.

There is no premade mechanism for listing unused redirects. The best you can do it use Special:WhatLinksHere on pages listed at Special:ListRedirects.