For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/LibreOffice:24.2/openSUSE_Tumbleweed/LibreOffice:24.2.repo
zypper refresh
zypper install libreoffice-impress
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/LibreOffice:24.2/15.6/LibreOffice:24.2.repo
zypper refresh
zypper install libreoffice-impress
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/LibreOffice:24.2/15.5/LibreOffice:24.2.repo
zypper refresh
zypper install libreoffice-impress