/etc/php/7.2/mods-available/facedetect.ini is in php-facedetect 1.1.0+git20170801-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | ; configuration for php facedetect module
; priority=20
extension=facedetect.so
|