After creating the KDE Plasma virtual desktop, any opened application window e.g. terminal cannot be controlled by user. There is no title bar, it is not possible to resize window.

As a workaround add window manager startup command to the 'DefaultDesktopCommand' key in the node.cfg

e.g.
DefaultDesktopCommand "env -u WAYLAND_DISPLAY /usr/bin/dbus-launch --sh-syntax --exit-with-session /usr/bin/startkde"

or if D-Bus is in use:
CommandStartKDE "env -u WAYLAND_DISPLAY /usr/bin/dbus-launch --sh-syntax --exit-with-session /usr/bin/startkde"