Uploading 1 million csv data extends the runtime and max upload

Hello , i am working on a project where i need to upload massive data and i mean relly big file. I Have builded a function where i can upload file to excel with field mapping, but unntil now i can upload only small excel file , i have tryed 1,000 rows and it works fine, but i need to upload million rows on that system so when i try to upload 1000,000 rows the system show me error of extending max size of uploading also runtime , i have tryed to extend php.ini max file upload to 1048M and runtime to 480 but still show same error. Does anyone have an idea how can i upload this amount of data without breaking the system?

My import function is builded in 2steps, I upload the excel file and save it on a db.table couse i need to match fields cvs header -> db.table header

public function parseImport(CsvImportRequest $request)
    {
        if ($request->has('header')) {
            $headings = (new HeadingRowImport)->toArray($request->file('csv_file'));
            $data = Excel::toArray(new ContactsImport, $request->file('csv_file'))[0];
        } else {
            $data = array_map('str_getcsv', file($request->file('csv_file')->getRealPath()));
            // $data = array_map('fgetcsv', file($request->file('csv_file')->getRealPath()));
        }

        if (count($data) > 0) {
            $csv_data = array_slice($data, 0, 2);

            $csv_data_file = CsvData::create([
                'csv_filename' => $request->file('csv_file')->getClientOriginalName(),
                'csv_header' => $request->has('header'),
                'csv_data' => json_encode($data)
            ]);
        } else {
            return redirect()->back();
        }

        $contact = new Contact;
        $table = $contact->getTable();
        $db_field = \Schema::getColumnListing($table);
        // dd($db_field);

        return view('import_fields', [
            'headings' => $headings ?? null,
            'csv_data' => $csv_data,
            'csv_data_file' => $csv_data_file,
            'db_field' => $db_field
        ]);
    }

this is my first step, Here my function breaks. I mean i cant pass first step to when i upload big data. And after this step i send data to blade file to match like this

@foreach ($csv_data[0] as $key => $value)
     <td class="px-6 py-4 whitespace-no-wrap text-sm leading-5 text-gray-900">
         <label for="csv_field_{{ $key }}">{{ $value }}</label>
          <select id="csv_field_{{ $key }}" name="fields[{{ $key }}]">
          <option value="">-- Select --</option>
                @foreach ($db_field as $field)
                        <option value="{{ $field }}"
                                 @if (old("fields.$key") == $field) selected @endif>{{ $field }}</option>
                 @endforeach
             </select>
          </td>
@endforeach

After mapping field i send the request to this function to make upload on mysql table

  public function processImport(Request $request)
    {
        // dd($request->fields);
        $data = CsvData::find($request->csv_data_file_id);
        $csv_data = json_decode($data->csv_data, true);

        foreach ($csv_data as $row) {
            $contact = new Contact();
            foreach ($request->fields as $csv_index => $db_field) {
                $csv_field = $row[$csv_index];
                $contact->$db_field = $csv_field;
            }
            $contact->save();
        }

        return redirect()->route('contacts.index')->with('success', 'Import finished.');
    }