/usr/share/man/man1/f2py3-dbg.1.gz is in python3-numpy-dbg 1:1.13.3-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/f2py3.1.gz
/usr/share/man/man1/f2py3.1.gz