Fix TabBar not visible on Mac Catalyst #32528
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Issue Details
The tab bar is not displayed on the Mac Catalyst platform.
Root Cause
On Mac Catalyst 18 and later, the native system code internally sets Hidden = true and Alpha = 0 by default, causing the TabBar to be invisible.
Description of Change
Explicitly set TabBar.Alpha to 1.0f and TabBar.Hidden to the correct value to make the TabBar visible.
Validated the behavior in the following platforms
Issues Fixed
Fixes #32329
Output ScreenShot