Cant access instantiated class

use Livewire\Component;
use App\Services\FlightApiService;

class FlightDepartureAutocomplete extends Component
{
    public $search;
    public $autocompleteResults;
    protected ?FlightApiService $flightApiService = null;

    public function mount(FlightApiService $flightApiService): void
    {
        $this->flightApiService = $flightApiService;

    }

    public function updatedSearch(): void
    {
        $params = [
            'string' => $this->search
        ];

        dd($this->flightApiService);
}

use Livewire\Component;
use App\Services\FlightApiService;

class FlightDepartureAutocomplete extends Component
{
    public $search;
    public $autocompleteResults;
    protected ?FlightApiService $flightApiService = null;

    public function mount(FlightApiService $flightApiService): void
    {
        $this->flightApiService = $flightApiService;

    }

    public function updatedSearch(): void
    {
        $params = [
            'string' => $this->search
        ];

        dd($this->flightApiService);
}

 $this->flightApiService = $flightApiService;

 $this->flightApiService = $flightApiService;