/usr/share/man/man3/genders_isattrval.3.gz is in libgenders0-dev 1.20-1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/genders_isnode.3.gz
/usr/share/man/man3/genders_isnode.3.gz