Nesting scaffolds in flutter to implement a slider - flutter

Question

I'd like to use a custom slider instead of Material Design drawer.
The default drawer does not occupy any space in the scaffold and is pushed over the layout. I want a NavBar just like the desktop version of this site.
Therefore, I nested a scaffold inside another one to make navigation possible inside the inner scaffold.
Here is my code:
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatefulWidget {
const MyApp({Key? key}) : super(key: key);
#override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
var show = true;
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Multi Scaffold',
home: Scaffold(
appBar: AppBar(
leading: IconButton(
icon: const Icon(Icons.menu),
onPressed: () {
setState(() {
show = !show;
});
},
),
title: const Text("App"),
),
body: InsideWidget(show: show),
),
);
}
}
class InsideWidget extends StatelessWidget {
const InsideWidget({
Key? key,
required this.show,
}) : super(key: key);
final bool show;
#override
Widget build(BuildContext context) {
var w = MediaQuery.of(context).size.width;
var h = MediaQuery.of(context).size.height;
return Row(
children: [
show
? SizedBox(
width: 0.2 * w,
height: h,
child: Drawer(
child: Container(
decoration: BoxDecoration(boxShadow: [
BoxShadow(
color: Colors.grey.withOpacity(0.5),
spreadRadius: 5,
blurRadius: 7,
offset: const Offset(0, 3),
)
]),
child: ListView(
children: const [
DrawerHeader(child: Text("Iman")),
ListTile(
leading: Icon(Icons.ac_unit),
title: Text("Home"),
),
Divider(),
ListTile(
leading: Icon(Icons.vertical_distribute_rounded),
title: Text("Home3"),
),
],
),
)),
)
: Container(),
SizedBox(
width: show ? 0.8 * w : w,
height: h,
child: const Scaffold(
backgroundColor: Colors.yellow,
body:
SizedBox(width: 100, child: Center(child: Text("Content")))),
),
],
);
}
}
As of Flutter docs, nesting scaffolds is not recommended.
I wonder if this is the best practice or whether a better way to implement this behaviour exists or not.