Setting up graphical login into KDE Plasma via SDDM on CentOS 8.2

# dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
# dnf --enablerepo=epel,PowerTools group \
  -y install "KDE Plasma Workspaces" "base-x"

# sudo systemctl set-default graphical.target
# sudo systemctl enable sddm

# reboot

Simple Desktop Display Manager (SDDM) is a display manager (a graphical login program and session manager) for the X11 and Wayland windowing systems. SDDM was written from scratch in C++ and supports theming via QML. Languages used: C++ Developer: KDE.