Maintainers for libqca2 are Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>.
You may want to refer to the following packages that are part of the same source: libqca-qt5-2, libqca-qt5-2-dev, libqca-qt5-2-plugins, libqca-qt6-2, libqca-qt6-dev, libqca-qt6-plugins, libqca2-dev, libqca2-doc, libqca2-plugins, qca-qt5-2-utils, qca-qt6-utils, qca2-utils.
You might like to refer to the libqca2 package page, to the Package Tracking System, or to the source package src:qca2's bug page.
If you find a bug not listed here, please report it.