How do I get information from DB, with select 2 in laravel 8

<script type="text/javascript">
        // CSRF Token
        var CSRF_TOKEN = $('meta[name="csrf-token"]').attr('content');
        $(document).ready(function() {

            $('#sel_city').select2({
                placeholder: "Selecteaza Oras",
                ajax: {
                    url: "{{route('getCities')}}",
                    type: 'POST',
                    dataType: 'json',
                    delay: 250,
                    data: function(params) {
                        return {
                            _token: CSRF_TOKEN,
                            search: params.term // search term
                        };
                    },
                    processResults: function(response) {
                        return {
                            
                            results: response
                        };
                    },
                    cache: true
                }

            });

        });
    </script>

Route::post('/getcities', [Controllers\ListingController::class, 'getCities'])
    ->name('getCities');
//end cities

use App\Models\Cities;

public function getCities(Request $request)
   {
       $search = $request->search;

       if ($search == '' ) {
           $cities = Cities::orderBy('city_name', 'asc')
               ->select('id', 'city_name')
               ->limit(5)
               ->get();
       }else{
           $cities = Cities::orderBy('city_name','asc')
           ->select('id','city_name')
           ->where('city_name', 'like', '%' .$search. '%')
           ->limit(5)
           ->get();

       }

       $response = array();

       foreach ($cities as $city) {
           $response[] = array(
               'id' => $city->id,
               'text' => $city->city_name
           );
       }
       return response()->json($request);

class Cities extends Model
{
    use HasFactory;
    protected $guarded = [];
   

    
}

and still not getting info from db, 
mention : i don't have errors in insepct.