更好的解决方案：
expand_hit_test: ^1.0.0
可能会出现分离在不同文件的情况

TapRegionSurface和TapRegion配合使用 扩大点击热区，

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text("adsasd"),),
        body: Center(
          child: Builder(
            builder: (context2) {
              return CustomExpandTapArea(onTap: (){
                print("121212");
                Navigator.of(context2).push(MaterialPageRoute(builder: (context){
                  return Scaffold(
                    appBar: AppBar(title: Text("adsasd"),),
                    body: Center(
                      child: Container(
                        color: Colors.blue,
                        width: 100,
                        height: 100,
                      ),
                    ),
                  );
                }));
              }, child: Container(
                color: Colors.blue,
                width: 100,
                height: 100,
              ),);
            }
          ),
        ),
      ),
    );
  }
}
class CustomExpandTapArea extends StatelessWidget {

  final Function onTap;
  final double extraNumber;

  final Widget child;

  final GlobalKey childKey = GlobalKey();
  CustomExpandTapArea({super.key, required this.onTap, this.extraNumber = 20, required this.child});

  //其实本质就是TapRegion的用法
  @override
  Widget build(BuildContext context) {
    return TapRegionSurface(
      child: Container(
        padding: const EdgeInsets.all(50),
        color: Colors.red,
        child: Container(
          color: Colors.green,
          child: TapRegion(
            onTapOutside: (PointerDownEvent event){
              RenderBox? tapedRenderBox =  childKey.currentContext?.findRenderObject() as RenderBox?;
              Offset? globalPosition = tapedRenderBox?.localToGlobal(Offset.zero);

              Rect renderBoxFrame = Rect.fromLTWH(globalPosition?.dx ?? 0, globalPosition?.dy ?? 0, tapedRenderBox?.size.width ?? 0, tapedRenderBox?.size.height ?? 0);

              Rect extraRenderBoxFrame = renderBoxFrame.inflate(extraNumber);
              print("asdasdas===${extraRenderBoxFrame.contains(event.position)}");

              if(extraRenderBoxFrame.contains(event.position)) {
                onTap();
              }
              print("点击在区域外");

            },
            onTapInside: (PointerDownEvent event){
              onTap();
              print("在区域内点击");
            }, child: Center(child: Container(key: childKey,child: child)),
          ),
        ),
      ),
    );
  }
}