The post type is ‘comic’. Comicpress uses the comic easel plugin as an archive plugin if that helps. I’m assuming this is related to the problem.
https://pastebin.com/hYWvd0Ff here’s the link.
Can’t tell if the latest update included this fix but unfortunately it’s still not working for me. Does it absolutely have to be in just a parent folder? I had the code in both the original functions.php file in the comicpress theme folder and the childtheme folder but still no dice.