Group search result from multiple indices to single hits in Algolia

I am trying to implement the Algolia search. I am using PHP.

Scenario: I have three tables (products, resources, and news). I am currently using MultipleQueries (DOCs Link Here) from this documentation.

As a result, I am getting results in the following format as in the documentation.

{
  "results": [
    {
      "hits": [
        {
            ........
        },
        ],
        "page": 0,
        "nbHits": 1,
        "nbPages": 1,
        "hitsPerPage": 20,
        "processingTimeMS": 1,
        "query": "jimmie paint",
        "params": "query=jimmie+paint&attributesToRetrieve=firstname,lastname&hitsPerPage=50"
        "index": "people"
    },
    {
      "hits": [
        {
            ...........
        },
        {
            ...........
        }
        ],
        "page": 0,
        "nbHits": 1,
        "nbPages": 1,
        "hitsPerPage": 20,
        "processingTimeMS": 1,
        "query": "jimmie paint",
        "params": "query=jimmie+paint&attributesToRetrieve=firstname,lastname&hitsPerPage=50"
        "index": "famous_people"
    },
    {
        ..............
    }
  ]
}

This is great, but WHAT I WANT is to group the results of 3 indices into single hits. Below is a sample I am expecting from the API.

{
  "results": [
    {
      "hits": [
        {
            ........
        },
        {
            ........
        },
        {
            ........
        },
        {
            ........
        },
        {
            ........
        },
        {
            ........
        },
        {
            ........
        },

        ],
        "page": 0,
        "nbHits": 1,
        "nbPages": 1,
        "hitsPerPage": 20,
        "processingTimeMS": 1,
        "query": "jimmie paint",
        "params": "query=jimmie+paint&attributesToRetrieve=firstname,lastname&hitsPerPage=50"
        "index": "indices goes here"
    },
  ]
}

I searched a lot but could not come with suitable solution. Is this even possible using Algolia. Any help would be greatly appreciated. Thank you in advance.