Microsoft 365 apps now support OpenDocument Format 1.4, saving ODF files in this format by default and adding features already in Open Office XML. General availability began in May 2024, with Office LTSC 2024 Preview support in June 2024. Details at the provided link.
Applies to: Microsoft 365 for the web · Microsoft 365 apps
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).