Undefined variable $datas in laravel 9

enter image description here

Undefined variable, how can I ask for help

But I have declared $datas on the controller like this

Controller

class JenisImunisasiController extends Controller
{
public function index() {

      $jenis = JenisImunisasi::get();
      return view('admin.jenisimunisasi.index', ['jenis_imunisasis' => $jenis]);
    
    }

}

and the view like this

index.blade.php

  @foreach ($datas as $key => $data)
                    <tr>
                        <th>{{ $datas->firstItem() + $key}}</th>
                        <th>{{ $data->nama_imun}}</th>
                        <th>{{ $data->umur }}</th>
                        <th>
                        </th>
                    </tr>
                    @endforeach
                </tbody>
            </table>
        </div>
        <div>
            Showing
            {{  $datas->firstItem() }}
            to
            {{  $datas->lastItem() }}
            of
            {{  $datas->total() }}
            Entries
        </div>
        <div class="fa-pull-right">
            {{ $datas->links() }}
        </div>
    </div>

>Solution :

Here check my code you need to pass key as datas instead of jenis_imunisasis in view function second parametere

class JenisImunisasiController extends Controller
{
    public function index()
    {

        $jenis = JenisImunisasi::get();
        return view('admin.jenisimunisasi.index', ['datas' => $jenis]);
    }
}