I know it existed in the past, finding some URIs (locally) such as: https://kde.org/applications/system/org.kde.wacomtablet https://kde.org/applications/en/wacomtablet As far as I am aware the project is alive, so the page should still exist?
https://repology.org/link/https://apps.kde.org/wacomtablet/
Probably caused by: https://invent.kde.org/websites/apps-kde-org/-/commit/ab91c7c2d0a7e1c0d2f6893d853058bad5a87c64 Was it the intended outcome?
They were excluded not because their projects weren't alive, but because they were considered less like apps but more like integral parts of the system. Anyway, it wasn't wise to remove them completely like that. I have added them back https://invent.kde.org/websites/apps-kde-org/-/commit/736d712e755e0d6bfc0e727c48c9197c46cebe7a