Not to totally dismiss that Duterte was popular, because he had the same kind of fanatical support Trump does, but from the PUBLiCUS Asia site they are "Philippines’ first & only registered Lobbying & Campaigns Management firm.".
Also note that his term was 2016-2022 and from 2017-2019 the Philippines was under martial law[1] and 2020-2022 (Covid time) everyone was on another mandatory lockdown[2]. In addition to this, crime was already dropping before his term, and his statistics are dubious[3]