The pagers were licensed by the Taiwanese company. Officially produced in Europe by Hungarian company BAC. https://www.nbcnews.com/news/world/taiwan-firm-denies-making-pagers-used-lebanon-explosions-rcna171594. But BAC a shell company so the rabbit hole continues.
https://www.nbcnews.com/news/world/taiwan-firm-denies-making-pagers-used-lebanon-explosions-rcna171594