Installation via Flatpak
Installation:
flatpak install flathub org.onlyoffice.desktopeditors
Launch:
flatpak run org.onlyoffice.desktopeditors

OnlyOffice Desktop is an office suite that has good support for Microsoft Office formats. Includes word processor, spreadsheet, presentations.
OnlyOffice Composition:
Supported formats:
Previously called TeamLab.
OnlyOffice can be installed on Linux using the following methods:
Installation:
flatpak install flathub org.onlyoffice.desktopeditors
Launch:
flatpak run org.onlyoffice.desktopeditors
sudo snap install onlyoffice-desktopeditors
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