@peter-gamma The OP already mentioned that LibreOffice works on other PinePhone OS's, but not in Libertine on Ubuntu Touch. Repeatedly mentioning this fact does not help bringing a solution to the issue closer.
While I genuinely am happy that you have found a solution that suits your specific needs, It would be more helpful finding a way to move this project forward in this regard, rather than repeatedly, and it seems in every thread you can, mentioning that it works for you on another distro. I would like to remind you that this is the Ubuntu Touch forums, after all.