/usr/lib/x86_64-linux-gnu/libefivar.so is in libefivar-dev 30-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libefivar.so.1.30
/usr/lib/x86_64-linux-gnu/libefivar.so.1.30