[Mac] Cannot show the scrollbars always using the Scrollbars visibility property "Always"

### Description

I am using MaUI scrollView control and I want to show the scrollbars "always" in the Mac Catalyst platform if the content size is more. So I am using the scrollview properties "HorizontalScrollBarVisibility" and "VerticalScrollBarVisibility" as "Always". However the scrollbar fades away after sometimes.

### Steps to Reproduce

1. Create a MaUI App.
2. Add a scroll View control, keep a large size content inside the scroll viewer.
3. Set the scrollbar visibility properties (horizontal and vertical) of the scrollviewer as "Always".
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### Version with bug

6.0 (current)

### Last version that worked well

Unknown/Other

### Affected platforms

Windows, macOS

### Affected platform versions

MacOS v12,1

### Did you find any workaround?

No

### Relevant log output

```shell
NA
```

Start by reproducing the issue with the shown ScrollView and its HorizontalScrollBarVisibility and VerticalScrollBarVisibility set to Always on Mac Catalyst. Compare the scrollbar behavior after it fades, then verify that both scrollbars remain visible when the content exceeds the viewport and check the same scenario on Windows.

Written by the indexing model from the issue text.