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