/usr/lib/x86_64-linux-gnu/libpolkit-qt5-gui-1.so is in libpolkit-qt5-1-dev 0.112.0-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpolkit-qt5-gui-1.so.1
/usr/lib/x86_64-linux-gnu/libpolkit-qt5-gui-1.so.1