There are some packages that Discover search will not find. Can only be installed by command line. STEPS TO REPRODUCE 1. search, for example, arch package "perl-http-date" OBSERVED RESULT The package not found. EXPECTED RESULT The package exists and can be installed by command line, so it should be shown. SOFTWARE/OS VERSIONS KDE Plasma Version: 5.26.5 KDE Frameworks Version: 5.101.0 Qt Version: 5.15.8
Discover isn't a graphical package manager; it find apps, not packages. So this is the intended design I'm afraid. If you want to install non-UI library packages, Discover isn't designed to support that use case, and you should use package manager software--either CLI or GUI.
*** This bug has been marked as a duplicate of bug 333438 ***