Why my file is not getting?

I am trying to upload file. But dd() is giving me null. But can't find any error! Going to else statement.

Controller:

if($request->file('incomingFile'))
{
            $incoming = new Incoming();
            $incoming->fileName = 'File';
            $incoming->save();
    
            $incomingAll = Incoming::latest()->first();
            $lastId = $incomingAll->id;
    
    
            $incomingFile = $request->file('incomingFile');
    
            dd($incomingFile);
        }
        else
        {
            dd("NO FILE");
        }
}

Blade:

<form action="{{ route('incoming.store') }}" method="POST" enctype="multipart/form-data">
            @csrf

            
            <div class="custom-file">
                <input type="file" class="custom-file-input" id="incomingFile" name="incomingFile">
                <label class="custom-file-label" for="incomingFile">Choose file</label>
            </div>
          


            <div>
                <input class="btn btn-success btn-lg mt-3" type="submit" value="{{ trans('global.upload') }}">
            </div>
        </form>

Model:

class Incoming extends Model
{
    protected $fillable = ['incomingFile'];

}