Install libreoffice-kde by entering the following commands in the terminal:
sudo apt update sudo apt install libreoffice-kde
Description:
transitional package for LibreOffice KDE 4 backend
This package used to contain the LibreOffice KDE 4 backend. The package has been renamed to libreoffice-kde4 to distinguish it from the kde5 backend. You can safely remove this package.
Homepage: http://www.libreoffice.org
Version: 1:6.0.3-0ubuntu1
Section: universe/kde