Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/LibreOffice:7.6/openSUSE_Tumbleweed/LibreOffice:7.6.repo
zypper refresh
zypper install libreoffice-filters-optional
Para 15.6 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/LibreOffice:7.6/15.6/LibreOffice:7.6.repo
zypper refresh
zypper install libreoffice-filters-optional
Para 15.5 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/LibreOffice:7.6/15.5/LibreOffice:7.6.repo
zypper refresh
zypper install libreoffice-filters-optional