/usr/share/doc/python3-dbus.mainloop.qt-dbg is in python3-dbus.mainloop.qt-dbg 4.11.4+dfsg-2+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python3-dbus.mainloop.qt
/usr/share/doc/python3-dbus.mainloop.qt