Long time before some people started to port OpenOffice/LibreOffice to Amiga OS4 (sadly only OS4). I saw some screenshots but that is also already a long time ago, seems that is a bit of a too big fish to fry.
Maybe a smarter way would be to just implement something like LibreOffice which can read files from LibreOffice. I gave it a go, and it was not that complicated as I thought it would be, at least if you are using the right language (FreePascal) and the right GUI set (MUIClass). The biggest problem is no usable table component in MUI (at least I know of, for all systems available). I had to implement one from scratch.
And this being FreePascal, of course it works on all Amiga Systems (not only OS4). I implemented only some styles/options (no font size and font name) but color and font styles are there, also left,center and right alignment. It even calculates cells. Funny tool, one could make a real LibreOffice Calc Viewer out of this.