Flutter close iOS number keyboard (has no "Done" button)

main.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_keyboard_visibility/flutter_keyboard_visibility.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: KeyboardVisibilityBuilder(
        builder: (BuildContext context, bool isKeyboardVisible) {
          return GestureDetector(
            behavior: HitTestBehavior.opaque,
            onTap: isKeyboardVisible
                ? () {
                    FocusScope.of(context).unfocus();
                    print("Keyboard closed");
                  }
                : null,
            child: AbsorbPointer(
              absorbing: isKeyboardVisible,
              child: Scaffold(
                appBar: AppBar(title: const Text("Close Keyboard Example")),
                body: Center(
                  child: Column(
                    children: const [
                      SizedBox(height: 24),
                      _AnyTappableWidget(),
                      SizedBox(height: 24),
                      _DigitsOnlyTextField(),
                    ],
                  ),
                ),
              ),
            ),
          );
        },
      ),
    );
  }
}

class _AnyTappableWidget extends StatelessWidget {
  const _AnyTappableWidget({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () => print("Text Tapped"),
      child: const Text("A tappable widget"),
    );
  }
}

class _DigitsOnlyTextField extends StatelessWidget {
  const _DigitsOnlyTextField({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: TextField(
        decoration: const InputDecoration(
          hintText: "Digits only",
          border: OutlineInputBorder(),
        ),
        controller: TextEditingController(),
        keyboardType: TextInputType.number,
        inputFormatters: [
          FilteringTextInputFormatter.digitsOnly,
        ],
      ),
    );
  }
}

Thank you so much! 🙏🏼