Why are nulls coming from the ajax comment form?

Question

AJAX

comment form

<div class="col-md-12" style="margin-top:20px;">
    <div class="card">
        <div class="card-header"><h3>Оставить мнение</h3></div>
    <form id="commentCreate">
    @csrf
        <input type="hidden" name="post_id" id="post_id" value="{{ $article->id }}">
        <input type="hidden" name="comment_id" value="0"> 

        <div class="card-body">
          <div class="input-group" >
            <input class="form-control" type="text" name="name" id="name" placeholder="Ваше имя">
            <input  class="form-control" type="text" name="email" id="email"  placeholder="Ваш Email">
    </div>

    <div class="input-group" style="margin-top:20px;">
      <textarea class="form-control" name="comment" id="comment" rows="3"></textarea>

</div>

<div class="col-auto" style="margin-top:20px;">
  <button type="submit" class="btn btn-success mb-3">Коментировать</button>

  </div>
  </form>
        </div>
    </div>
</div>
</div>

AJAX Code

<script src="{{ asset('public/js/jquery-3.5.1.min.js') }}"></script>
  <script type="text/javascript">   
  $( document ).ready(function() {
  $('button').click( function(event) { event.preventDefault();

  var name = $('#name').val();
  var email = $('#email').val();
  var comment = $('#comment').val();
  var post_id = $('#post_id').val();
  
$.ajax({
url: 'api/store',
type: "POST",
data: {name:name, email:email, comment:comment}, post_id:post_id,
headers: {'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')},
dataType: 'json',
cache: false,
contentType: false,
processData: false,
success: function(data){
alert(data);

//$(this).parent().append(
'<div class="col-md-12" style="margin-top:20px;" ><div class="card"><div class="card-header">+name+</div>
<div class="card-body">+comment+</div></div></div>
');
}
});
});
});
</script>

CommentController

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Comment;
use App\user;
use App\Blog_article;

class CommentController extends Controller
{
       public function store(Request $request)
    {
        dd($request->all());
        $comment = Comment::add($request->all());        
  }
}

database screenshot


Even in the alert, the request does not come, and dd() does not help either