Did pacman get packagekit support
It appears using pacman on Arch is the recommended method for the repos, per this issue adding warnings: https://invent.kde.org/plasma/discover/-/merge_requests/829
or are we just talking about flatpaks here
https://apps.kde.org/discover/ ->
"With Discover, you can manage software from multiple sources, including your operating system's software repository, Flatpak repos, the Snap store, or even AppImages from store.kde.org."
Fedilab, a multi-services client which speaks the LemmyAPI (Piefed claims 95% API compatibility) has what you're looking for, including if you want them to be big buttons, small links or whatnot. Tapping a tag takes you to a more robust tag search screen etc. Available in F-Droid and GPlay.