Man pages matching name udev_device_new_from_subsystem_sysname in section 3:

udev_device_new_from_subsystem_sysname.3.en	debian 10 / libudev-dev
udev_device_new_from_subsystem_sysname.3.en	debian 11 / libudev-dev
udev_device_new_from_subsystem_sysname.3.en	debian 12 / libudev-dev