Fuse.js - search through nested values

Question

I use fuse.js with useExtendedSearch enabled. I have an array of objects. Each of the objects has a key of type array that contains objects.

I want to search for values in both the outer array and the inner array. It works if the search keyword is in the outer array. But it does not work, if the inner array contains the search keyword.

In the code below, I want to filter the countries such that it contains only the object whose name is exactly as the search keyword.

const data = [{
    "continent": "Asia",
    countries: [{
        name: "Korea"
      },
      {
        name: "Japan"
      },
      {
        name: "China"
      },
      {
        name: "Pakistan"
      },
    ]
  },
  {
    "continent": "Europe",
    countries: [{
        name: "Albania"
      },
      {
        name: "France"
      },
      {
        name: "England"
      },
      {
        name: "Spain"
      },
    ]
  },
  {
    "continent": "Africa",
    countries: [{
        name: "Algeria"
      },
      {
        name: "Angola"
      },
      {
        name: "Benin"
      },
      {
        name: "South Africa"
      },
    ]
  }
]

const options = {
  useExtendedSearch: true,
  keys: [
    "continent",
    "countries.name"
  ]
};

const fuse = new Fuse(data, options);

// Change the pattern
const pattern = "=Pakistan"

console.log(fuse.search(pattern))

<script src="https://cdn.jsdelivr.net/npm/[email protected]"></script>

But it only filters the outer array.

[{
  "continent": "Asia",
  countries: [{
      name: "Korea"
    },
    {
      name: "Japan"
    },
    {
      name: "China"
    },
    {
      name: "Pakistan"
    },
  ]
}]

I expect it to retun:

 [{
  "continent": "Asia",
  countries: [{
    name: "Pakistan"
  }]
}]     

Is it possible to achive this in Fuse.js?