From their repo:

Plasma Login

Plasma Login provides a display manager for KDE Plasma, forked from SDDM and with an new frontend providing a greeter, wallpaper plugin integration and System Settings module (KCM).

What we want

  • Great out-of-box experience in multi-monitor and high DPI and HDR
  • Keyboard layout switching
  • Virtual keyboards
  • Easy Chinese/Japanese/Korean/Vietnamese (CJK) input
  • Screen readers for blind people (which then means volume control)
  • Remote (VNC/RDP) support from startup
  • Deeper Plasma integration including:
    • Display and keyboard brightness control
    • Full power management
    • Pairing trusted bluetooth devices
    • Login to known Wi-Fi for remote LDAP
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[–] 2 points 9 months ago (2 children)

The lock screen and display manager are two separate pieces of software. The display manager runs before a user profile has been selected for graphical login, so it does not have access to your user desktop/display settings

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  • [–] 2 points 9 months ago

    Supposedly both the display manager and greeters have system-wide configuration for this purpose, however. And the issue with notifications and DE overlays are present post login, too.

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