There is a "pre-alpha", experimental build of LibreOffice for Android (via
F-Droid), but far from being usable.
However, if you want to create or edit documents (text, spreadsheet,
presentation) efficiently, you may also need an OTG hub, a keyboard and a
mouse.
To make the editing comfortable, you may also need a chair and a desk, and
preferably, an external display.
Taking these into consideration, a netbook may be more suitable than a smart
phone for document editing. This is why there's not much need for office
suite on Android.
