Man pages matching name nutscan_get_serial_ports_list in section 3:

nutscan_get_serial_ports_list.3.en	debian 10 / libupsclient-dev
nutscan_get_serial_ports_list.3.en	debian 11 / libnutscan-dev
nutscan_get_serial_ports_list.3.en	debian 12 / libnutscan-dev