[Flutter Web] Printing not working on mobile Safari browser

[MingSern]

Describe the bug
I'm using Flutter Web and I'm trying to print a pdf file. Printing works expectedly in desktop browser, but when I tested on my iPhone's Safari browser, nothing happens when I tried to print. I am not sure is this suppose to happen or not. I am using iPhone 12, I tried on iPhone 13 as well, same result. The existing demo also have this issue on my device: https://davbfr.github.io/dart_pdf/

To Reproduce

• iOS device
• Safari browser
• Flutter Web
• printing: ^5.13.1
• htmltopdfwidgets: ^1.0.3
• pdf: ^3.11.1

Code snippet to reproduce the behavior:

import 'package:htmltopdfwidgets/htmltopdfwidgets.dart' as pdf;
import 'package:pdf/widgets.dart' as pw;
import 'package:printing/printing.dart';

// this is what I wrote in my code
await Printing.layoutPdf(
    onLayout: (format) async {
      final doc = pw.Document();
      final body = '<img src="$imageUrl" alt="qr"/>';
      final widgets = await pdf.HTMLToPdf().convert(body);

      doc.addPage(pw.Page(
        pageFormat: const pdf.PdfPageFormat(3420, 5700),
        build: (_) => widgets.first,
      ));

      return doc.save();
    },
);

Expected behavior
The browser opens a printing option to print the pdf.

Screenshots
As you can see in the video, when I tap on the print button, nothing seems to happen
https://github.com/user-attachments/assets/b70d6f66-ae82-4438-a285-372b6efcd52b

Flutter Doctor

[✓] Flutter (Channel stable, 3.24.1, on macOS 14.6.1 23G93 darwin-arm64, locale
    en-GB)
    • Flutter version 3.24.1 on channel stable at
      /Users/mingsern/fvm/versions/3.24.1
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 5874a72aa4 (3 weeks ago), 2024-08-20 16:46:00 -0500
    • Engine revision c9b9d5780d
    • Dart version 3.5.1
    • DevTools version 2.37.2

[!] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/mingsern/Library/Android/sdk
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/to/macos-android-setup for more details.

[✗] Xcode - develop for iOS and macOS
    ✗ Xcode installation is incomplete; a full installation is necessary for iOS
      and macOS development.
      Download at: https://developer.apple.com/xcode/
      Or install Xcode via the App Store.
      Once installed, run:
        sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
        sudo xcodebuild -runFirstLaunch
    ✗ CocoaPods not installed.
        CocoaPods is a package manager for iOS or macOS platform code.
        Without CocoaPods, plugins will not work on iOS or macOS.
        For more info, see https://flutter.dev/to/platform-plugins
      For installation instructions, see
      https://guides.cocoapods.org/using/getting-started.html#installation

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2023.3)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build
      17.0.10+0-17.0.10b1087.21-11572160)

[✓] VS Code (version 1.93.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.96.0

[✓] Connected device (2 available)
    • macOS (desktop) • macos  • darwin-arm64   • macOS 14.6.1 23G93 darwin-arm64
    • Chrome (web)    • chrome • web-javascript • Google Chrome 128.0.6613.120

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 2 categories.

Desktop (please complete the following information):

• iOS
• Android
• Browser
• Windows
• Linux

Smartphone (please complete the following information):

• Device: [iPhone 12, iPhone 13]
• OS: [iOS 17.6.1]
• Browser: [Safari, Chrome]
• Version: [N/A]

Additional context
There is a similar issue reported, 3 years ago, #640