KDE applications are distributed using various way.
KDE applications can be installed from multiple source. We should display the various sources in kde.org/applications.
For this we need some custom AppStream tags: see https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html#tag-custom.
We should agree on the custom tags name, before starting implementing.
KDE applications are available in following stores: Steam Store, Windows Store, F-Droid and the Play Store.