Cant Display my Reply under the Comment Laravel 5.7 - laravel

Question

I can't display my reply under each comment. Here is my code...
Comment model
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Comment extends Model
{
public function commentable()
{
return $this->morphTo();
}
public function user()
{
return $this->belongsTo('App\User');
}
public function comments()
{
return $this->morphMany('App\Comment', 'commentable');
}
}
Post model
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Post extends Model
{
protected $fillable = [
'user_id', 'topic', 'body', 'category',
];
public function user()
{
return $this->belongsTo('App\User');
}
public function comments()
{
return $this->morphMany('App\Comment', 'commentable');
}
}
Comment controller
<?php
namespace App\Http\Controllers;
use App\Comment;
use App\Post;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
class CommentController extends Controller
{
public function store(Request $request, $post)
{
$comment = new Comment;
$comment->body = $request->body;
$comment->user_id = Auth::user()->id;
$post = Post::find($post);
$post->comments()->save($comment);
return back();
}
public function replyStore(Request $request, $comment)
{
$comment = new Comment;
$comment->body = $request->body;
$comment->user_id = Auth::user()->id;
$comment = Comment::find($comment);
$comment->comments()->save($comment);
return back();
}
}
Routes
Route::post('/comment/store/{post}', 'CommentController#store')->name('comment.add');
Route::post('/reply/store/{commentid}', 'CommentController#replyStore')->name('reply.add');
View
#extends('layouts.app')
#section('content')
<div class="container">
<div class="row justify-content-center">
<div class="col-md-12">
#if ($errors->any())
<div class="alert alert-danger">
<ul>
#foreach ($errors->all() as $error)
<li>{{ $error }}</li>
#endforeach
</ul>
</div>
#endif
<div class="card">
<div class="card-header">{{$post->topic}}
Create New Post
</div>
<div class="card-body">
#if (session('status'))
<div class="alert alert-success" role="alert">
{{ session('status') }}
</div>
#endif
<h3>{{$post->topic}}</h3>
<p>{{$post->body}}</p>
</div>
</div>
<form action="/comment/store/{{$post->id}}" method="post" class="mt-3">
#csrf
<div class="form-group">
<label for="">Comment :</label>
<textarea class="form-control" name="body" id="" rows="3"></textarea>
<br>
<input type="submit" value="Comment" class="btn btn-secondary">
</div>
</form>
<div class="row mt-5">
<div class="col-md-10 mx-auto">
<h6 style="border-bottom:1px solid #ccc;">Recent Comments</h6>
#foreach($post->comments as $comment)
<div class="col-md-12 bg-white shadow mt-3" style="padding:10px; border-radius:5px;">
<h4>{{$comment->user->name}}</h4>
<p>{{$comment->body}}</p>
<button type="submit" class="btn btn-link" onclick="toggleReply({{$comment->id}})">
Reply
</button>
<div class="row">
<div class="col-md-11 ml-auto">
{{-- #forelse ($replies as $repl)
<p>{{$repl->body}}</p>
#empty
#endforelse --}}
</div>
</div>
</div>
<form action="/reply/store/{{$comment->id}}" method="post"
class="mt-3 reply-form-{{$comment->id}} reply d-none">
#csrf
<div class="form-group">
<textarea class="form-control" name="body" id="" rows="3"></textarea>
<br>
<input type="submit" value="Reply" class="btn btn-secondary">
</div>
</form>
#endforeach
</div>
</div>
</div>
</div>
</div>
#endsection
#section('js')
<script>
function toggleReply(commentId) {
$('.reply-form-' + commentId).toggleClass('d-none');
}
</script>
#endsection
I have created the normal table with parent_id but I don't know how to display the replies for each comment. Please, anyone who can help me with this - I am stranded here and the error coming from the second controller function which is replystore() saying it doesn't recognize the comments() method. Please help me out to display the reply.