A Flag widget to display flags (doesn't work on Dart Pad)

flag.dart

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(
          title: Text('Displaying flags 🇺🇳 does not work on DartPad!')
        ),
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

const kFunWithFlags = 'ar be ca de ee fi gn hu ie jm kr ls md no om pe';

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Wrap(
      children: [
        ...kFunWithFlags.split(' ').map((code) => Flag(code: code, size: 96))
      ],
    );
  }
}

class Flag extends StatelessWidget {
  const Flag({
    Key? key,
    required this.code,
    this.size = 32,
  }) : super(key: key);

  final String code;
  final double size;

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      width: size,
      height: size,
      child: Text(
        String.fromCharCodes([
          127365 + code.codeUnitAt(0),
          127365 + code.codeUnitAt(1),
        ]),
        style: TextStyle(fontSize: size, height: 1.1),
        textAlign: TextAlign.center,
      ),
    );
  }
}