KDE releases all their apps on Windows and amcOS. In fact most of their users are in Windows. Krita makes most money off of Windows Store.

This is why nobody can rely on distro managers. Not to mention FlatPaks and so on.

Lastly, KDE maintains their own Qt fork for packaging purposes.

That has nothing to do with it. While both relate to KDE, we are talking about two very different things. You are talking about release channels, we are talking about development headers.