Draggable list view flutter - flutter

Question

Hi the listview that is displayed below allows you to scroll a series of elements that are shown in a flutter list, the problem is that it is not possible to scroll the entire list, how can I correct this thing?
Flutter code:
import 'package:costal/Model/Maintenance.dart';
import 'package:costal/View/constants/color.dart';
import 'package:costal/View/utils/support.dart';
import 'package:costal/View/widgets/SceduledCard.dart';
import 'package:flutter/material.dart';
import 'package:rflutter_alert/rflutter_alert.dart';
import 'DetailScreen.dart';
class ScheduledScreen extends StatelessWidget {
const ScheduledScreen({Key? key}) : super(key: key);
Future<List<Maintenance>> loadvalues() async {
return await Maintenance.getMaintenanceScheduled();
}
Future<bool> completeDay(BuildContext context, Maintenance man) async {
var check = await man.completeDay();
if (check == true) {
Share.alertCustom(context, AlertType.success, 'Manutenzione Completa', 'Hai completato la manutenzione', true);
} else {
Share.alertCustom(context, AlertType.error, 'Errore', 'non è stato possibile completare le manutenzioni', false);
}
return check;
}
Widget getLoader() {
return const Align(
alignment: Alignment.center,
child: CircularProgressIndicator(
value: 50,
semanticsLabel: 'Loading value',
),
);
}
#override
Widget build(BuildContext context) {
return FutureBuilder<List<Maintenance>>(
future: loadvalues(),
builder: (BuildContext context, AsyncSnapshot<List<Maintenance>> snapshot) {
if (!snapshot.hasData) {
return getLoader();
} else {
return Scaffold(
appBar: AppBar(
centerTitle: true,
title: const Text(
'Manutenzioni',
style: TextStyle(
fontFamily: 'Poppins',
color: kPrimaryColor,
),
),
leading: CircleAvatar(
radius: 20,
backgroundColor: const Color(0xff94d500),
child: IconButton(
icon: const Icon(Icons.access_alarms_sharp),
onPressed: () async {
completeDay(context, snapshot.data![0]);
},
),
),
),
body: Wrap(
//the magic
children: [
Container(
padding: const EdgeInsets.all(20),
child: ListView.separated(
shrinkWrap: true,
itemCount: snapshot.data!.length,
separatorBuilder: (context, index) {
return const SizedBox(
height: 10,
);
},
itemBuilder: (context, index) {
return GestureDetector(
onTap: (() {
Navigator.push(
context,
MaterialPageRoute(builder: (context) => DetailScreen(snapshot.data![index])),
);
}),
child: SceduledCard(man: snapshot.data![index], c: Colors.blue),
);
}))
],
),
);
}
});
}
}