/usr/lib/x86_64-linux-gnu/libmpichfort.so is in libmpich-dev 3.2-6build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libmpichfort.so.12.1.0
/usr/lib/x86_64-linux-gnu/libmpichfort.so.12.1.0