well, it's got me stumped too. hard to believe this wasn't listed 13 years ago, or by now, but I can't find it under any Superman/Action title, or even Countdown, as that's what tie-ins it reprints. Usually it would be under the Trade Paperback tab with whatever title it would go with, but there isn't any tab for the main titles it should be with, but when it collects issues from multiple titles, there's no telling where it might be. I wasted over 45 minutes doing every search I can think of, including just 'superman action' and superman etc, and nada.

so it may have been missed, or maybe ronbatman can find it, or add it. and your pic link doesn't work, those seem to be unique to each visitor there. I get a different file url number than yours when doing 'view image', so here's GCD's page for it for CPG to get more info and the pic: https://www.comics.org/issue/512378/
edited by collectibleshop on 3/19/2021