Hi, I think the terms no-follow and no-index are mixed up in this conversation. please correct me if i am wrong.
no-follow : means all link that is listed in that webpage (href="http://www.example.com/" rel="nofollow">link</a>) are not given a high rank value by google but it still will be indexed and show up on sitemap.xml and shows up in google search.
no-index : this tag will tell google not to crawl the page (exmp: <meta name="robots" content="noindex" />) so it will not show up in google search.
so if a page is set to nofollow check the source of the page and make sure any external link added to the page have similar tag to this --> (href="http://www.example.com/" rel="nofollow">link</a>
check this example from flynax demo -->
https://postimg.org/image/85c6g6vtx/