Android Issues Recording Audio in Xamarin using Plugin.AudioRecorder

I have successfully utilised NateRickard's three year old Nuget Plugin.AudioRecorder to make audio recordings and play them back.
I have been careful to set both StopRecordingOnSilence and StopRecordingAfterTimeout to false to allow extended recordings that can only finish on a button click.
The app works perfectly on my physical iOS device, but not on my Android device.
I have a DisplayAlert that shows the file path to the newly recorded audio, which on the Android device comes up as blank.
I will post here my AudioPage.xaml.cs, MainActivity.cs and AndroidManifest.xml as I believe my issue lies somewhere here. Any help would be greatly appreciated.

AudioPage.xaml.cs

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
 
using Xamarin.Forms; 
using Xamarin.Forms.Xaml; 
using Xamarin.Essentials; 
using Plugin.AudioRecorder; 
 
namespace HandsFreeNotes.View 
{ 
 [XamlCompilation(XamlCompilationOptions.Compile)] 
 public partial class AudioPage : ContentPage 
 { 
 private readonly AudioRecorderService audioRecorderService = new AudioRecorderService() 
 { 
 StopRecordingOnSilence = false, 
 StopRecordingAfterTimeout = false 
 }; 
 private readonly AudioPlayer audioPlayer = new AudioPlayer(); 
 
 public AudioPage() 
 { 
 // add a bit of padding to cater to the "notch" on the iPhone. 
 if (Device.RuntimePlatform == Device.iOS) { Padding = new Thickness(0, 40, 0, 0); } 
 
 InitializeComponent(); 
 } 
 
 private async void BackButton_Clicked(object sender, EventArgs e) 
 { 
 await Navigation.PopModalAsync(); 
 } 
 
 async void RecordNewAudio_Clicked(object sender, EventArgs e) 
 { 
 var status = await Permissions.RequestAsync<Permissions.Microphone>(); 
 
 if (status != PermissionStatus.Granted) 
 return; 
 
 if (audioRecorderService.IsRecording) 
 { 
 
 await audioRecorderService.StopRecording(); 
 
 AudioImage.Source = "flatlineblue.png"; 
 RecordNewAudio.Text = "Record New Audio"; 
 RecordNewAudio.TextColor = Color.Black; 
 
 try 
 { 
 // Use default vibration length 
 Vibration.Vibrate(); 
 } 
 catch (FeatureNotSupportedException ex) 
 { 
 // Feature not supported on device 
 // await DisplayAlert("Alert", "Vibrate is not supported on this device", "Continue"); 
 } 
 catch (Exception ex) 
 { 
 // Other error has occurred. 
 // await DisplayAlert("Alert", "Vibrate is not supported on this device", "Continue"); 
 } 
 
 // audioPlayer.Play(audioRecorderService.GetAudioFilePath()); 
 await DisplayAlert("Alert", "Recorded audio is at: " + audioRecorderService.GetAudioFilePath(), "Continue"); 
 } 
 else 
 { 
 try 
 { 
 // Use default vibration length 
 Vibration.Vibrate(); 
 } 
 catch (FeatureNotSupportedException ex) 
 { 
 // Feature not supported on device 
 // await DisplayAlert("Alert", "Vibrate is not supported on this device", "Continue"); 
 } 
 catch (Exception ex) 
 { 
 // Other error has occurred. 
 // await DisplayAlert("Alert", "Vibrate is not supported on this device", "Continue"); 
 } 
 
 AudioImage.Source = "audiocrop.gif"; 
 RecordNewAudio.Text = "Recording... Press to Finish"; 
 RecordNewAudio.TextColor = Color.Red; 
 
 await audioRecorderService.StartRecording(); 
 
 } 
 
 } 
 
 private void PlaySelectedAudioButton_Clicked(object sender, EventArgs e) 
 { 
 try 
 { 
 Vibration.Vibrate(); 
 audioPlayer.Play(audioRecorderService.GetAudioFilePath()); 
 } 
 catch (Exception ex) 
 { 
 // an error has occurred. 
 } 
 
 
 } 
 } 
} 

MainActivity.cs

using System; 
 
using Android.App; 
using Android.Content.PM; 
using Android.Runtime; 
using Android.OS; 
using AndroidX.Core.Content; 
using Android; 
using AndroidX.Core.App; 
 
namespace HandsFreeNotes.Droid 
{ 
 [Activity(Label = "HandsFreeNotes", Icon = "@drawable/hfn256x256", Theme = "@style/MainTheme", MainLauncher = false, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize )] 
 public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity 
 { 
 protected override void OnCreate(Bundle savedInstanceState) 
 { 
 base.OnCreate(savedInstanceState); 
 
 // Added these lines for RecordAudio Permissions per LeonLu-MSFT 22/07/2021 
 
 if (ContextCompat.CheckSelfPermission(this, Manifest.Permission.RecordAudio) != Permission.Granted) 
 { 
 ActivityCompat.RequestPermissions(this, new String[] { Manifest.Permission.RecordAudio }, 1); 
 } 
 // CrossMediaManager.Current.Init(this); // I'm not using CrossMediaManager 
 
 
 Xamarin.Essentials.Platform.Init(this, savedInstanceState); 
 global::Xamarin.Forms.Forms.Init(this, savedInstanceState); 
 LoadApplication(new App()); 
 } 
 public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults) 
 { 
 Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults); 
 
 base.OnRequestPermissionsResult(requestCode, permissions, grantResults); 
 } 
 } 
} 

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="net.grime.apps.handsfreenotes"> 
 <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="30" /> 
 <application android:label="HandsFreeNotes.Android" android:theme="@style/MainTheme"></application> 
 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
 
 <!-- Added these lines to cater to collecting Geolocation through Xamarin Essentials. GMB 11/06/2021, then 25/06/2021 
 https://learn.microsoft.com/en-us/xamarin/essentials/geolocation?context=xamarin%2Fxamarin-forms&tabs=android--> 
 
 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> 
 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
 <uses-feature android:name="android.hardware.location" android:required="false" /> 
 <uses-feature android:name="android.hardware.location.gps" android:required="false" /> 
 <uses-feature android:name="android.hardware.location.network" android:required="false" /> 
 
 <!-- Added the following lines to allow for the sending of email through Xamarin Essentials. GMB 13/05/2021 
 https://learn.microsoft.com/en-us/xamarin/essentials/email?context=xamarin%2Fxamarin-forms&tabs=android --> 
 
 <queries> 
 <intent> 
 <action android:name="android.intent.action.SENDTO" /> 
 <data android:scheme="mailto" /> 
 </intent> 
 </queries> 
 
 <!-- Added the following lines to allow for the recording and playback of audio. GMB 07/07/2021 
 Gerald Versluis: https://www.youtube.com/watch?v=2V8J7v3FP78 --> 
 
 <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" /> 
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 
 <uses-permission android:name="android.permission.RECORD_AUDIO" /> 
 
 <!-- Added the following lines to allow for Vibrate through Xamarin Essentials. GMB 08/07/2021 
 https://learn.microsoft.com/en-us/xamarin/essentials/email?context=xamarin%2Fxamarin-forms&tabs=android --> 
 
 <uses-permission android:name="android.permission.VIBRATE" /> 
 
</manifest>