Someone has been working on modernising kuickshow in a separate branch: https://mail.kde.org/pipermail/kde-devel/2022-November/001448.html I wanted to make sure you are aware of it, in particular wrt Wayland/X11 compat.
Previous mail to the list that got the developer started: https://mail.kde.org/pipermail/kde-devel/2022-August/001245.html
A new release would also be a perfect opportunity to bump ebuild to EAPI-8. This package is one of only less than 30 in ::gentoo inheriting kde.org.eclass and ecm.eclass with EAPI-7.
Thank you for pointing this out, I completely missed it myself. As you've already seen, we're currently working on some minor issues. I'll create a new Kuickshow release for Gentoo next weekend. It'll be either just a minor update with the current state in master, or a major one with the new code. Regardless, I'll update the ebuild to EAPI-8.
And apologies for always taking so long to reply to messages. I do read the eMail notifications but I tend to forget about replying if I don't do it right away.
No worries, I'm happy to sometimes be able to do my tiny bit in connecting some dots.