Internal: b/326218346

Steps to reproduce

This is basically the same issue as #120650, but specific to web. I believe that issue was fixed but only for Android and iOS (not sure about other platforms either). When using a screen reader on an ExpansionTile element, it reads as "group" instead of "button" and gives no hint as to how to activate it. On Android and iOS, it reads something like "Double-tap to expand" or "Double-tap to collapse".

I'm able to reproduce the iissue with the code sample below just in dartpad, using VoiceOver on my Mac laptop. Run the sample and navigate to the ExpansionTile element using the screen reader.

Expected results

Screen reader should read something like "Hello World! button, double tap to expand"

Actual results

Screen reader reads "Hello World! group"

Code sample

import 'package:flutter/material.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: ExpansionTile(
            title: Text('Hello, World!'),
            children: [
              Text('Item 1'),
              Text('Item 2'),
              Text('Item 3'),
            ],
          ),
        ),
      ),
    );
  }
}

Screenshots or Video

None

Logs

N/A

Flutter Doctor output

N/A