$form = $this->createForm(OrderType::class, $Order, [
            // 確認画面から注文処理へ遷移する場合は, Orderエンティティで値を引き回すためフォーム項目の定義をスキップする.
            'skip_add_form' => true,
        ]);

        dump($form);
        dump($request);
        $form->handleRequest($request);
        dump($form);
        exit;

Form {#1993 ▼
  -config: FormBuilder {#1994 ▶}
  -parent: null
  -children: OrderedHashMap {#1995 ▶}
  -errors: []
  -submitted: false
  -clickedButton: null
  -modelData: Order {#1659 ▼
    -id: 102
    -pre_order_id: "fe2074be1dfc5904ca6f7d698ac40014b864a898"
   +shop_name: "テストshop"
}

Request {#2 ▼
  +attributes: ParameterBag {#6 ▼
    #parameters: array:5 [▶]
  }
  +request: ParameterBag {#5 ▼
    #parameters: array:1 [▼
      "_shopping_order" => array:1 [▶]
    ]
  }
  +query: ParameterBag {#4 ▼
    #parameters: []
  }
}

Form {#1993 ▼
  -config: FormBuilder {#1994 ▶}
  -parent: null
  -children: OrderedHashMap {#1995 ▶}
  -errors: []
  -submitted: true
  -clickedButton: null
  -modelData: Order {#1659 ▼
    -id: 102
    -pre_order_id: "fe2074be1dfc5904ca6f7d698ac40014b864a898"
    -order_no: "102"
    +shop_name: null
}