[iOS] Horizontal CollectionView ignores FlowDirection.RightToLeft in MAUI 10

[darrabam]

Description

When using a horizontal CollectionView (ItemsLayout="HorizontalList") on iOS, changing the FlowDirection to RightToLeft has no effect.
The items continue to render and scroll in left-to-right order, and the scroll direction does not invert.

This issue occurs only on iOS — the same code works correctly on Android, where the horizontal item ordering and scroll direction properly respect the RTL layout.

This regression makes RTL languages (Arabic, Hebrew, Farsi, etc.) behave incorrectly in horizontal lists under MAUI 10.

iOS (FlowDirection ignored)

Android (Correct RTL behavior)

Expected Behavior

When switching to FlowDirection.RightToLeft, the CollectionView should:

• Reverse item visual order
• Start the list from the right edge
• Reverse scroll direction (right → left)

Behavior should match Android’s correct implementation.

Steps to Reproduce

No response

Link to public reproduction project repository

https://github.com/darrabam/CollectionViewRTLBug

Version with bug

10.0.11

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

No response

Affected platforms

iOS

Affected platform versions

iOS 26 / Xcode: 26.1.1

Did you find any workaround?

No

Relevant log output

[HarishKumarSF4517]

This issue has been validated in Visual Studio Code 1.106.3 with MAUI versions 9.0.120, 10.0.0-preview1, 10.0.0-rc.2, 10.0.10 & 10.0.11 . It can be reproduced on iOS platform

[kubaflo]

Fixed by #32318

[darrabam]

Fixed by #32318

Thanks for pointing it out, I've tested it and it doesn't fix it correctly, shared my test results in #32318