Span text style issue

main.dart

import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';

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

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

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Padding(
          padding: const EdgeInsets.all(30.0),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              const Spacer(),
              Text.rich(
                TextSpan(
                  children: [
                    TextSpan(
                      text: 'Plain text - more and more of plain text, wrapping to the next line. ',
                      style: Theme.of(context).textTheme.bodySmall,
                    ),
                    // This renders the empty space in a different text style,
                    // affecting the alignment of neighboring spans.
                    // This should not be necessary though for focus, the
                    // following WidgetSpan is focusable without it.
                    // TextSpan(
                    //   text: ' ',
                    //   recognizer: TapGestureRecognizer(),
                    //   semanticsLabel: '',
                    // ),
                    WidgetSpan(
                      alignment: PlaceholderAlignment.middle,
                      child: InkWell(
                        onTap: () { print('tapped'); },
                        child: Text(
                        'Learn more',
                        style: Theme.of(context).textTheme.bodySmall!.copyWith(
                          decoration: TextDecoration.underline,
                          color: Colors.blue,
                        ),
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}