check date format in laravel carbon code example
Example 1: laravel carbon today date format
$today = Carbon::now()->format('Y-m-d'); //yyyy-mm-dd etc
Example 2: carbon format date in laravel
1. First parse the created_at field as Carbon object.
$createdAt = Carbon::parse($item['created_at']);
2.Then you can use
$suborder['payment_date'] = $createdAt->format('M d Y');