Problem Solvers,
I'm Stuck with the orientation issue once i placed the content views inside below structure.
Root : CarouselPage
Child : TabView
TabView Child : ContentPage
Content Page Child : ContentViews
In below a attached images Yellow Color I used for ScrollView and Green color Used for StackLayout. App works in a portrait mode. On iOS It works fine even in landscape view.
I tested the View's code in a Contentpage and it works well. You can create button click events to simulate TabbedPage to navigate to the pages and avoid using the TabView plugin.
Simulate TabbedPage, you can refer to: https://forums.xamarin.com/discussion/comment/370015/#Comment_370015
Answers
I've written a basic sample based on the information you provided and it works well when rotating the screen. As the image shows:

Please post the code of ContentViews. Or would you mind sharing a basic demo? It'll help to reproduce the issue and get a solution.
What's the TabView? A plugin? I use Xam.Plugin.TabView to deploy the code and it works well.
view.xaml.cs
i tried again, sill same issue exists.
Would you mind sharing a basic demo?
yes I will share the basic demo
hi this is the sample demo app. i posted it in the git hub public repository. kindly give solution for my problem. Thanks in advance.
https://github.com/jebaseelan10/TabView.git
I tested the View's code in a Contentpage and it works well. You can create button click events to simulate TabbedPage to navigate to the pages and avoid using the TabView plugin.
Simulate TabbedPage, you can refer to: https://forums.xamarin.com/discussion/comment/370015/#Comment_370015
Hi Friend, We are really happy about your effort on fixing our issue. Thanks for this Great Solution. It is Greatly helping in our development process.