[Bug] [iOS] When navigating the page as PushModelAsync, the content page background color is always black even when the content page background color is set as transparent.

[EswaranSyncfusion]

Description

My goal is to view the content of the bottom page from the top of the other content page. In order to accomplish this, I used PushModelAsync to navigate and set the BackgroundColor property of the navigation page to Transparent. I can view the content on the bottom page on Android. However on the iOS platform, a black color is always displayed and I am unable to read the content of the bottom page. Why is the background color always black even when it is set to be transparent in PushModelAsync?

Note: The iOS platform displays a white screen when I change the navigation to PushAsync.

Steps to Reproduce

1. Click the button to navigate to another page.
2. Check the current page background color.

Expected Behavior

Background color should not be black and it should be transparent when navigating using PushModelAsync

Actual Behavior

Background color is always black even when the content page background color is set as transparent when navigating using PushModelAsync

Basic Information

• Platform Target Frameworks:
  • iOS: 14.4
  • Android: Android 11 API 30
• NuGet Packages: Xamarin.forms: 5.0.0.2012
• Affected Devices: iPhone 12 Pro MAX iOS 14.4 (Simulator)

Environment

Show/Hide Visual Studio info

=== Visual Studio Community 2019 for Mac ===

Version 8.10.17 (build 2)
Installation UUID: bf5e36da-0081-44f9-954b-3895820edcba
	GTK+ 2.24.23 (Raleigh theme)
	Xamarin.Mac 6.18.0.23 (d16-6 / 088c73638)

	Package version: 612000162

=== Mono Framework MDK ===

Runtime:
	Mono 6.12.0.162 (2020-02/2ca650f1f62) (64-bit)
	Package version: 612000162

=== Roslyn (Language Service) ===

3.10.0-4.21269.26+029847714208ebe49668667c60ea5b0a294e0fcb

=== NuGet ===

Version: 5.9.0.7134

=== .NET SDK (x64) ===

SDK: /usr/local/share/dotnet/sdk/5.0.400/Sdks
SDK Versions:
	5.0.400
	3.1.416
	3.1.412
MSBuild SDKs: /Applications/Visual Studio.app/Contents/Resources/lib/monodevelop/bin/MSBuild/Current/bin/Sdks

=== .NET Core Runtime ===

Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
	5.0.9
	3.1.22
	3.1.18

=== .NET Core 3.1 SDK ===

SDK: 3.1.416

=== .NET 5.0 SDK ===

SDK: 5.0.400

=== Xamarin.Profiler ===

Version: 1.6.15.68
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

=== Updater ===

Version: 11

=== Apple Developer Tools ===

Xcode 12.4 (17801)
Build 12D4e

=== Xamarin.Mac ===

Version: 8.4.0.0 (Visual Studio Community)
Hash: 8fc41ae82
Branch: xcode13.2
Build date: 2021-12-09 01:07:56-0500

=== Xamarin.iOS ===

Version: 14.17.2.4 (Visual Studio Community)
Hash: 62151a4df
Branch: d16-10-preview2
Build date: 2021-04-14 08:56:34-0400

=== Xamarin Designer ===

Version: 16.11.0.60
Hash: 56f9b80b0
Branch: remotes/origin/d16-11
Build date: 2021-12-15 02:44:16 UTC

=== Xamarin.Android ===

Version: 12.0.0.3 (Visual Studio Community)
Commit: xamarin-android/d16-11/f0e3c2d
Android SDK: /Users/syncfusion/Library/Developer/Xamarin/android-sdk-macosx
	Supported Android versions:
		4.4    (API level 19)
		4.4.87 (API level 20)
		5.0    (API level 21)
		5.1    (API level 22)
		6.0    (API level 23)
		7.0    (API level 24)
		7.1    (API level 25)
		8.0    (API level 26)
		8.1    (API level 27)

SDK Tools Version: 26.1.1
SDK Platform Tools Version: 30.0.4
SDK Build Tools Version: 30.0.2

Build Information: 
Mono: c633fe9
Java.Interop: xamarin/java.interop/d16-11@476bb5b
ProGuard: Guardsquare/proguard/v7.0.1@912d149
SQLite: xamarin/sqlite/3.35.4@85460d3
Xamarin.Android Tools: xamarin/xamarin-android-tools/d16-11@87af37b

=== Eclipse Temurin JDK ===

Java SDK: /Library/Java/JavaVirtualMachines/temurin-8.jdk/Contents/Home
1.8.0.302
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

=== Android SDK Manager ===

Version: 16.10.0.13
Hash: 1b81df5
Branch: remotes/origin/d16-10
Build date: 2021-11-12 01:17:32 UTC

=== Android Device Manager ===

Version: 16.10.0.15
Hash: 89dcc0b
Branch: remotes/origin/d16-10
Build date: 2021-11-12 01:17:52 UTC

=== Build Information ===

Release ID: 810170002
Git revision: 58f7763d4d64fcf005a474d25a5d9fd5ce46d7f5
Build date: 2022-01-05 12:51:28-05
Build branch: release-8.10

=== Operating System ===

Mac OS X 10.15.7
Darwin 19.6.0 Darwin Kernel Version 19.6.0
    Sun Nov 14 19:58:51 PST 2021
    root:xnu-6153.141.50~1/RELEASE_X86_64 x86_64

Screenshots

Android

iOS

The issue reproducing sample is provided below:
DemoSample