/usr/lib/x86_64-linux-gnu/libnl-route-3.so is in libnl-route-3-dev 3.2.21-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libnl-route-3.so.200.16.1
/usr/lib/x86_64-linux-gnu/libnl-route-3.so.200.16.1