/usr/lib/x86_64-linux-gnu/libqca.so is in libqca2-dev 2.1.1-4+b2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libqca.so.2
/usr/lib/x86_64-linux-gnu/libqca.so.2