/usr/mipsisa64r6el-linux-gnuabi64/libo32/libnss_nisplus.so.2 is in libc6-mips32-mips64r6el-cross 2.27-3ubuntu1cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/mipsisa64r6el-linux-gnuabi64/libo32/libnss_nisplus-2.27.so