Application store, discover allows installing, updating and uninstalling applications from the store, supposedly in flatpak format, or as native packages

As for the application, Discover works well on mobile.

Something we should consider is some indication in the appstream metadata that indicates whether an application is optimized for mobile. That's something to discuss with upstream appstream and the Purism and UBPorts folks.

Deployment of developed application: Defined workflow for third party developers how to develop an application and publish it on the KDE store to be installed by users through discover

I guess that's mostly a matter of getting it into distributions or Flathub