This is the code to export in Excel(SpreadSheet) in Laravel.

<?php

namespace AppHttpResources;

use IlluminateHttpRequest;
use IlluminateHttpResourcesJsonJsonResource;

class LeadsResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @return array<string, mixed>
     */

    public function fieldData($field_data)
    {
        $fieldData = htmlspecialchars_decode($field_data, true); // Note: $field_data is already encoded with  JSON_UNESCAPED_UNICODE
        $fieldData = json_decode($fieldData, true);

        // return $fieldData;
        //dump($fieldData);
        $newData = [];
        if(is_array($fieldData))
        {

            foreach($fieldData as $field)
            {   
                $data = [ucfirst(str_replace('_', ' ', $field->name)) => str_replace('_', ' ', implode(', ', isset($field->values) ? (array)$field->values : (array)'' ))];

                //dump($data);
                $data = json_encode($data, JSON_UNESCAPED_UNICODE);

                // $data = implode(',',[ucfirst(str_replace('_', ' ', $field['name'])) => str_replace('_', ' ', implode(', ', isset($field['values']) ? (array)$field['values'] : (array)'' ))]);
                //dump($data);
                $field1 = htmlspecialchars_decode($data);
                //dump($field1);
    
                $data_new = str_replace('_',' ',$field1);
                $data_new = str_replace('"',' ',$field1);
                // $data_new = str_replace('{',' ',$field1);
                // $data_new = str_replace('}',' ',$field1);
                //dump($data_new);
                $newData[] = $field1;
            }


            //dump($newData);
            return $newData;
        }   
        else{
           return $field_data;
        }
    }
    public function toArray(Request $request): array
    {
        return [
            'id' => $this->id,
            'account_id' => $this->account_id,
            // 'campaign_id' => $this->campaign_id,
            'campaign_name' => $this->campaign_name,
            // 'adset_id' => $this->adset_id,
            'adset_name' => $this->adset_name,
            // 'ad_id' => $this->ad_id,
            'ad_name' => $this->ad_name,
            // 'ad_status' => $this->ad_status,
            'lead_id' => $this->lead_id,
            'lead_created_time' => $this->lead_created_time,
            'platform' => $this->platform,
            'form_id' => $this->form_id,
            'field_data' => $this->fieldData($this->field_data),
            'last_processed_time' => $this->last_processed_time,
            // 'created_at' => $this->created_at,
            // 'updated_at' => $this->updated_at,
        ];
    }
}

When I only return after

$fieldData = htmlspecialchars_decode($field_data, true); return;

I get proper data in feild_data column like this :

[{“name”:”तुमच्या_लग्नाला_किती_वर्षे_झाली_आहेत?_”,”values”:[“X-Y_वर्ष”]},{“name”:”what_is_your_full_name?”,”values”:[“XYZ”]},{“name”:”what_is_your_phone_number?”,”values”:[“91xxxxxxxxx”]},{“name”:”what_is_your_email_address?”,”values”:[“[email protected]”]},{“name”:”city”,”values”:[“xxxxx”]},{“name”:”first_name”,”values”:[“Xxxxxx”]},{“name”:”last_name”,”values”:[“YYYYY”]}]

But when I do the above way I am getting it like this

[“{“u0924u0941u092eu091au094du092fu093e
u0932u0917u094du0928u093eu0932u093e u0915u093fu0924u0940
u0935u0930u094du0937u0947 u091du093eu0932u0940
u0906u0939u0947u0924? “:”X-Y
u0935u0930u094du0937″}”,”{“What is your full
name?”:”xxxxxxx”}”,”{“What is your phone
number?”:”+91xxxxxxxx”}”,”{“What is your email
address?”:”[email protected]”}”,”{“City”:”xxxxxxxxxx”}”,”{“First
name”:”Xxxxx”}”,”{“Last name”:”XXXXXX”}”]

I needed help in decoding for excel sheet, its looking properly in Laravel blade page, but not in Excel Sheet.