As Sarah Bond points out, Trismegistos maps their ca. 400,000 papyri entries and shows many papyri found outside of Egypt.
It is quite interesting how many papyri are found in the Nile delta region, soggier than your average desert. The lower map raises the question of how many might come out of recent looting in desert regions of Syria. Of course papyrus was more widely used in the ancient world than the regions where it is preserved.