Start on an Avalonia Ui.

Gamenight.Ui/Gamenight.Ui.Android/MainActivity.cs

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+using Android.App;
+using Android.Content.PM;
+using Avalonia;
+using Avalonia.Android;
+
+namespace gamenight.ui.Android;
+
+[Activity(
+    Label = "gamenight.ui.Android",
+    Theme = "@style/MyTheme.NoActionBar",
+    Icon = "@drawable/icon",
+    MainLauncher = true,
+    ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.ScreenSize | ConfigChanges.UiMode)]
+public class MainActivity : AvaloniaMainActivity<App>
+{
+    protected override AppBuilder CustomizeAppBuilder(AppBuilder builder)
+    {
+        return base.CustomizeAppBuilder(builder)
+            .WithInterFont();
+    }
+}