/usr/mipsisa64r6el-linux-gnuabin32/libo32/libnss_nisplus.so is in libc6-dev-mips32-mipsn32r6el-cross 2.27-3ubuntu1cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/mipsisa64r6el-linux-gnuabin32/libo32/libnss_nisplus.so.2