How to use if/else in a form

I am trying to use if/else on a submit button given that if an employee time in is null a Sign In button will be shown otherwise Sign Out button is displayed. Below is my set_attendance form. The if/else does not work as expected. Could you please help how to make it work.

<table class="table table-bordered table-striped">
                    <thead>
                        <tr>
                           <th> {{ __(' SL') }}</th>
                           <th> {{ __(' Employee Name') }}</th>
                           <th> {{ __('Action') }}</th>
                            
                        </tr>
                    </thead>
                    <tbody>

                        @foreach($attendances as $key => $attd)
                            <tr>
                                <td>{{$key+1}}</td>
                                <td>{{ $attd['name'] }}</td>     
                                <td>
                                <form action="{{ route('attendance.timeclock') }}" method="post" name="department_add_form">
                                {{ csrf_field() }}
                                <input type="hidden" name="id" id="id" value="{{ $attd['id'] }}">
                               
                                @if($timein[1]['timein'] == Null)
                                <button type="submit" class="btn btn-primary btn-flat"><i class="icon fa fa-plus"></i> {{ __('Sign IN') }}</button>
                                @else
                                <button type="submit" class="btn btn-primary btn-flat"><i class="icon fa fa-plus"></i> {{ __('Sign Out') }}</button>
                                @endif
                           
                                </form>
                                </td>   

                                
                            </tr>

                            @endforeach
                        
                       
                    </tbody>
                </table>

Below is my timeclockcreate method in a controller

public function timeclockcreate(Request $request){

    $id = $request->input('id');
    $data['attendances'] = User::all()->toArray();

    $data['timein'] = User::query()
    ->leftjoin('attendances', 'attendances.user_id', '=', 'users.id')
    ->select('attendances.*', 'users.*')
    ->orderBy('users.name', 'ASC')
    ->get()
    ->toArray();

    return view('fms.attendances.set_attendance',$data)->with('id', $id)->with('message', 'Inserted successfully.');
 }

My attendance table

public function up()
{
    Schema::create('attendances', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('created_by');
        $table->integer('user_id')->unsigned();
        $table->time('timein')->nullable();
        $table->time('timeout')->nullable();
        $table->date('logdate');
        $table->string('status');   
        $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
         $table->timestamps();
    });
}