Atlas $search how to return only matching sub-documents

MongoDB Atlas Atlas Search
4

Here is my index

{
  "mappings": {
    "dynamic": false,
    "fields": {
      "profiles": {
        "fields": {
          "_id": {
            "type": "objectId"
          },
          "firstName": {
            "analyzer": "diacriticFolder",
            "searchAnalyzer": "diacriticFolder",
            "type": "string"
          },
          "lastName": {
            "analyzer": "diacriticFolder",
            "searchAnalyzer": "diacriticFolder",
            "type": "string"
          },
          "pageName": {
            "analyzer": "diacriticFolder",
            "searchAnalyzer": "diacriticFolder",
            "type": "string"
          },
          "type": {
            "type": "string"
          }
        },
        "type": "document"
      }
    }
  },
  "analyzers": [
    {
      "charFilters": [],
      "name": "diacriticFolder",
      "tokenFilters": [
        {
          "type": "icuFolding"
        }
      ],
      "tokenizer": {
        "type": "keyword"
      }
    }
  ]
}

how can I return only the matched sub documents? using multi stage aggregation is not an option as I can not match matched sub documents without running the search query, which can only be ran once.