I created a thing I really needed a few years ago: support for #Procreate and #ClipStudio files in #KDE!
This isn't actual, complete support (like accessing layers and so on) but you can open them in Gwenview, preview them in Dolphin and stuff 😊
Source code for the plugins is available at https://invent.kde.org/redstrate/procreate-kde and https://invent.kde.org/redstrate/clipstudio-kde. You can download Fedora packages at https://copr.fedorainfracloud.org/coprs/redstrate/personal/.