Flutter web app pinch in out zoom not working

I am developing websites from Flutter. Flutter website does not support pinch in out zoom. Laptop tracked pinch in out zoom not working. Nor Android or IOS app touch zoom in out working.

What I want to do is make website zoom by CTRL+ and TrackPad Pinch Gesture and Touchscreen 2 finger gesture. CTRL+ working fine. But TrackPad pinch and Touchscreen gesture not working.

This problem is occuring on default code too.

import 'package:flutter/material.dart';

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

class MyCustomScrollBehavior extends MaterialScrollBehavior {
  const MyCustomScrollBehavior();

  Set<PointerDeviceKind> get dragDevices => {

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      scrollBehavior: const MyCustomScrollBehavior(),
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      home: const MyHomePage(title: 'Flutter Demo Home Page'),

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  State<MyHomePage> createState() => _MyHomePageState();

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {

  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
              style: Theme.of(context).textTheme.headlineMedium,
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.

Is there any solution? Thanks in Advance.