Flutter 来自FutureProvider的数据只打印两个不同的变量，它们对一个实例只有一次相同的值，为什么

我有一个数据模型产品，其数据存储在FireStore中.当我使用Provider读取它的数据并打印产品dim_x和dim_y的字段时，我只打印出不同的值.例如,

我有两个产品 P1，dim_x=200.0，dim_y=100.0 具有dim_x=80.0和dim_y=80.0的P2

下面代码中的print命令只打印80.0一次，这是为什么？ ({200.0,100.0}，{80.0}) 为什么不打印({200.0,100.0}，{80.0，80.0})？

class Product {
  final String pid;
  final double dim_x;
  final double dim_y;
  
  Product(
      {required this.pid,
      required this.dim_x,
      required this.dim_y,})
}

class CreateJob extends StatefulWidget {
  CreateJob({super.key});

  @override
  State<CreateJob> createState() => _CreateJobState();
}

class _CreateJobState extends State<CreateJob> {

Future<List<Product>> fetchProductsFromBase() async {
  // .. code for getting data from firestore collection
}

@override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        FutureProvider<List<Product>>(create: (_) => fetchProductsFromBase(), initialData: []),
        // ...,
      ],
      child: SafeArea(
//...somewhere down the widget tree
//ScheduledDelivery()
}

class ScheduledDelivery extends StatefulWidget {

  const ScheduledDelivery({super.key});

  @override
  State<ScheduledDelivery> createState() => _ScheduledDeliveryState();
}

class _ScheduledDeliveryState extends State<ScheduledDelivery> {
  late List<Product> productList;

  @override
  void initState() {
    super.initState();
    productList = context.read<List<Product>>();
  }

  @override
  Widget build(BuildContext context) {
    print('\n${productList.map((e) => {e.dim_x, e.dim_y})}\n');
// ...

}