The Garava Type v3.74 is © Bhikkhu Pesala, 2016, but freely available from his website. As it has 6 styles, 3000+ Glyphs and he designs with PagePlus in mind, I just downloaded it.
To see what difference it makes, I applied it to an existinf PPlus file where it displays with a decorative set of capitals (top half of pic). If I just select it in LibreOffice, it displays "normally" (bottom half of pic).
No doubt this is a quirk of a en-coding somewhere as the decorative caps are down in the "Latin Extended-D" specials, but can anyone throw light on why it's showing up in what I thought was a "standard" type text in a *.ppp but not in LibreOffice?