Those repackages of libreoffice packages are actually official.
https://www.libreoffice.org/download/libreoffice-from-microsoft-and-mac-app-stores/
These versions are free software (as in open source) but there's a small charge to cover the effort of putting software in the app stores, and to help develop the software (and build our communities).
Those repackages of libreoffice packages are actually official.
https://www.libreoffice.org/download/libreoffice-from-microsoft-and-mac-app-stores/