Splash Screen: unxlg.com

A KDE splash screen is the animated loading screen that appears after you log in and before your desktop is ready. It's a customizable visual that provides a brief animation or image while KDE Plasma loads, and you can change it through your system settings.

To install, run the following commands:

wget -c https://dl.unxlg.com/f/splashs-screen-unxlg.tar.gz
tar -xzvf splashs-screen-unxlg.tar.gz -C $HOME/.local/share/plasma/look-and-feel/
echo -e "[KSplash]\nTheme=unxlg.comSplash-Plasma6" > ~/.config/ksplashrc

Now just reboot the system.