Sibling of the same category will be move as per id or record list.

[bharatows]

There is an issue for sequence sibling sorting order: Please check screenshot for more information.

$categories = json_decode('[{"id":1,"children":[{"id":2,"children":[{"id":3}]},{"id":8},{"id":9}]},{"id":4,"children":[{"id":7},{"id":5,"children":[{"id":6}]}]}]',true);
Node::rebuildSubtree(null, $categories);

CREATE TABLE `categories` (
  `id` bigint UNSIGNED NOT NULL,
  `title` text COLLATE utf8mb4_unicode_ci,
  `_lft` int UNSIGNED NOT NULL DEFAULT '0',
  `_rgt` int UNSIGNED NOT NULL DEFAULT '0',
  `parent_id` int UNSIGNED DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

INSERT INTO `categories` (`id`, `title`, `_lft`, `_rgt`, `parent_id`) VALUES
(1, 'Category 1', 1, NULL, 1, 10, NULL),
(2, 'Category 1.1', 1, NULL, 2, 5, 1),
(3, 'Category 1.1.1', 1, NULL, 3, 4, 2),
(4, 'Category 2', 1, NULL, 11, 18, NULL),
(5, 'Category 2.2', 1, NULL, 14, 17, 4),
(6, 'Category 2.2.2', 1, 1, 15, 16, 5),
(7, 'Category 2.2.2.2', 1, NULL, 12, 13, 4),
(8, 'Category 1.2', 1, NULL, 6, 7, 1),
(9, 'Category 1.3', 1, NULL, 8, 9, 1);

[bharatows]

Issue with display fetch order I have used Node::get()->toTree(); rather than Node::defaultOrder()->get()->toTree(); it is working fine. thanks