Min_score not working as expected

[Ayush_Mehta_Engineer (Ayush Mehta (Engineering))]

I am trying to fetch the results with a minimum score of 1 using min_score using the following query but I am still getting responses with null score
I know that my query is bit complex and there could be better ways to implement it, I am new to elasticsearch and still learning. Can anyone help me out with this

        {
          "constant_score": {
            "filter": {
              "bool": {
                "should": [
                  {
                    "multi_match": {
                      "query": "bone doctor",
                      "fields": [
                        "dcName",
                        "dcCity",
                        "dcLocation",
                        "doctorName",
                        "doctorQualification",
                        "doctorSpecialization",
                        "packageName",
                        "packageFilters"
                      ],
                      "type": "cross_fields",
                      "operator": "and"
                    }
                  }
                ]
              }
            },
            "boost": 1
          }
        },
        {
          "constant_score": {
            "filter": {
              "bool": {
                "should": [
                  {
                    "multi_match": {
                      "query": "bone",
                      "fields": [
                        "dcName",
                        "dcCity",
                        "dcLocation",
                        "doctorName",
                        "doctorQualification",
                        "doctorSpecialization",
                        "packageName",
                        "packageFilters"
                      ],
                      "type": "phrase"
                    }
                  }
                ]
              }
            },
            "boost": 1
          }
        },
        {
          "constant_score": {
            "filter": {
              "bool": {
                "should": [
                  {
                    "multi_match": {
                      "query": "doctor",
                      "fields": [
                        "dcName",
                        "dcCity",
                        "dcLocation",
                        "doctorName",
                        "doctorQualification",
                        "doctorSpecialization",
                        "packageName",
                        "packageFilters"
                      ],
                      "type": "phrase"
                    }
                  }
                ]
              }
            },
            "boost": 1
          }
        },
        {
          "constant_score": {
            "filter": {
              "bool": {
                "should": [
                  {
                    "multi_match": {
                      "query": "bone",
                      "fields": [
                        "dcName",
                        "dcCity",
                        "dcLocation",
                        "doctorName",
                        "doctorQualification",
                        "doctorSpecialization",
                        "packageName",
                        "packageFilters"
                      ],
                      "type": "phrase_prefix"
                    }
                  }
                ]
              }
            },
            "boost": 3
          }
        },
        {
          "constant_score": {
            "filter": {
              "bool": {
                "should": [
                  {
                    "multi_match": {
                      "query": "doctor",
                      "fields": [
                        "dcName",
                        "dcCity",
                        "dcLocation",
                        "doctorName",
                        "doctorQualification",
                        "doctorSpecialization",
                        "packageName",
                        "packageFilters"
                      ],
                      "type": "phrase_prefix"
                    }
                  }
                ]
              }
            },
            "boost": 3
          }
        },
        {
          "constant_score": {
            "filter": {
              "bool": {
                "should": [
                  {
                    "multi_match": {
                      "query": "bone",
                      "fields": [
                        "dcName",
                        "dcCity",
                        "dcLocation",
                        "doctorName",
                        "doctorQualification",
                        "doctorSpecialization",
                        "packageName",
                        "packageFilters"
                      ],
                      "type": "most_fields",
                      "fuzziness": "auto"
                    }
                  }
                ]
              }
            },
            "boost": 1
          }
        },
        {
          "constant_score": {
            "filter": {
              "bool": {
                "should": [
                  {
                    "multi_match": {
                      "query": "doctor",
                      "fields": [
                        "dcName",
                        "dcCity",
                        "dcLocation",
                        "doctorName",
                        "doctorQualification",
                        "doctorSpecialization",
                        "packageName",
                        "packageFilters"
                      ],
                      "type": "most_fields",
                      "fuzziness": "auto"
                    }
                  }
                ]
              }
            },
            "boost": 1
          }
        }
      ]