Any Word type document from within Libre or outside of Libre?
You don’t precise what kind of ‘office’ documents you are thinking about, but if you can open an office document in LibreOffice, then you can export a copy of it to PDF.
Your toolbar probably has a button - to the left of the “print” button - which will automatically save the document as a .pdf file.
It will default to the current document name and folder. You may change these defaults.
Alternatively from the FILE menu dropdown >Export as > Export as PDF