Install libreoffice-systray by entering the following commands in the terminal:
sudo apt update sudo apt install libreoffice-systray
Description:
LibreOffice "Quickstarter" for the desktop notification area
LibreOffice is a full-featured office productivity suite that provides a near drop-in replacement for Microsoft(R) Office. . This package provides a "QuickStarter" for the notification area of desktops.
Homepage: http://www.libreoffice.org
Version: 1:6.0.3-0ubuntu1
Section: universe/misc