Description

The StrokeLineJoin property on the Border control does not have any visual effect when running on iOS and macOS Catalyst platforms. The join style appears unchanged regardless of the value provided (Miter, Bevel, or Round), while it works correctly on Android and Windows.

IOS:

Windows:

Steps to Reproduce

1. Launch the application using the given sample - BorderSample.zip
2. Run the application in Android and Windows platform. The Values does not have effect on Windows

Expected Behavior:
Changing StrokeLineJoin should affect how the corners of stroked shapes are rendered—e.g., sharp (Miter), beveled (Bevel), or rounded (Round)—across all platforms.

Actual Behavior:
On iOS and macOS, the stroke join style remains visually unchanged despite assigning different StrokeLineJoin values.

Link to public reproduction project repository

No response

Version with bug

10.0.0-preview.4

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

No response

Affected platforms

iOS, macOS

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output