Laravel DD api doesn't show full array

I am currently in the process of requesting information from an API. When I try to decode the response of json with json_decode() it doesn't give me the right data. When I use var_dump() it does. How can I make my code correctly display the API data?

I have tried looking on the internet. I have used var_dump() with succes yet it doesn't show the information right as with the dd().

 $response = curl_exec($curl);
        $err = curl_error($curl);

        curl_close($curl);
        if ($err) {
            echo "cURL Error #:" . $err;
        } else {
            $json = json_decode($response);
        }

This is the code I use to access the API data. This is the response with var_dump($json):

Example: array(344) {
  [0]=>
  object(stdClass)#1148 (1) {
    ["product"]=>
    object(stdClass)#1141 (3) {
      ["information"]=>
      object(stdClass)#1140 (1) {
        ["deliveryDays"]=>
        string(2) "10"
      }
      ["attributes"]=>
      array(6) {
        [0]=>
        object(stdClass)#1142 (2) {
          ["attribute"]=>
          string(18) "Type of sunglasses"
          ["value"]=>
          string(5) "basic"
        }
        [1]=>
        object(stdClass)#1143 (2) {
          ["attribute"]=>
          string(15) "variantid (mcp)"
          ["value"]=>
          string(9) "P105675W1"
        }
        [2]=>
        object(stdClass)#1144 (2) {
          ["attribute"]=>
          string(11) "color (mcp)"
          ["value"]=>
          string(17) "Solid Black/White"
        }
        [3]=>
        object(stdClass)#1145 (2) {
          ["attribute"]=>
          string(8) "quantity"
          ["value"]=>
          string(3) "100"
        }
        [4]=>
        object(stdClass)#1146 (2) {
          ["attribute"]=>
          string(16) "printing process"
          ["value"]=>
          string(12) "tampon print"
        }
        [5]=>
        object(stdClass)#1147 (2) {
          ["attribute"]=>
          string(13) "delivery type"
          ["value"]=>
          string(6) "normal"
        }
      }
      ["price"]=>
      float(213.3)
    }
  }

When I use dd($json):

  +"product": {#1150 ▼
      +"information": {#1149 ▶}
      +"attributes": array:6 [▼
        0 => {#1151 …2}
        1 => {#1152 …2}
        2 => {#1153 …2}
        3 => {#1154 …2}
        4 => {#1155 …2}
        5 => {#1156 …2}
      ]
      +"price": 407.7
    }

As you can see, the API shows ...2 in array 6 but it should show a value. What is wrong about my code?

I want the API to dd the data correctly and show me the data in the api

via Chebli Mohamed