Item spacing not properly applied between items in CollectionView Horizontal LinearItemsLayout.

[Tamilarasan-Paranthaman]

Description

Item spacing is not correctly applied between the group header and the items in the CollectionView when using LinearItemsLayout.

It works correctly on Android but not on iOS. Refer to the attached image for reference: the left spacing is missing for the second and third group headers on iOS.

Android	iOS

Steps to Reproduce

1. Run the sample attached in the repository.
2. Observe that the spacing is not properly applied between the item and the group header (on the left side).

Link to public reproduction project repository

https://github.com/Tamilarasan-Paranthaman/Maui-Reported-Issues/tree/main

Version with bug

9.0.0 GA

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, macOS, I was not able test on other platforms

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[Zhanglirong-Winnie]

This issue has been verified using Visual Studio 17.13 Preview 1( 9.0.10 & 9.0.0). Can repro this issue on iOS platform. I also tried to validate on .net8, but got so many errors.

error CS0103: The name 'ConfigChanges' does not exist in the current context
error CS0246: The type or namespace name 'Activity' could not be found (are you missing a using directive or an assembly reference?)