Man pages matching name detect_handledata in section 3:

detect_handledata.3.en	debian 10 / libchardet-dev
detect_handledata.3.ko	debian 10 / libchardet-dev
detect_handledata.3.en	debian 11 / libchardet-dev
detect_handledata.3.ko	debian 11 / libchardet-dev
detect_handledata.3.en	debian 12 / libchardet-dev
detect_handledata.3.ko	debian 12 / libchardet-dev