This task was originally about the fact that the "Nominated for deletion" checkbox in New Pages Feed essentially doesn't do anything -- it does not add/subtract nominated articles from the feed. That bug is now being addressed here: T202582. What this task has become about is the fact that the current filter logic does not allow a user to generate a list of only articles nominated for deletion or only articles that are redirects.
For posterity, here is the original text of the description by @Vexations:
When I set a filter in the New Pages Feed (Special:NewPagesFeed) to Show: Unreviewed pages and Nominated for deletion That: Show all I would expect to see only articles that have been nominated for deletion, specifically, those articles that have a trashcan icon and are "Marked for deletion". In stead I see the same list of articles that I would see if I had not checked Nominated for deletion.