It communicates with the desktop shell (like Plasma ) to provide startup feedback, such as the "bouncing icon" cursor that tells users an app is loading. How It Works in the KDE Architecture
For those troubleshooting KDE issues, seeing klauncher in a process list is normal; it is a sign that the backend for application management is active. Release Service 19.12.0 Full Log Page - KDE Community klauncher
Understanding KLauncher: The Engine Behind Application Startup in KDE It communicates with the desktop shell (like Plasma
If a new application needs to be opened, KIO sends a message to KLauncher. KIO sends a message to KLauncher.