"Metal Write-Only Backbuffer" Player Setting is not accessible through the Scripting API

How to reproduce:
1. Create and open a new Project
2. Create and open a new Script
3. Call the Player Settings setting “Metal Write-Only Backbuffer” through the Scripting API

Actual result: Setting cannot be modified via scripts
Expected result: Setting is callable and accessible by the Scripting API

Reproducible with: 6000.0.84f1, 6000.3.26f1, 6000.6.6f1, 6000.7.0b5, 7000.0.a8

Notes:

• Reporter noted that this causes issues: "This is an issue because having it enabled prevents ScreenCapture.CaptureScreenshot() and associated calls from working in iOS builds"
• Scripting API library can be found here - https://docs.unity3d.com/6000.3/Documentation/ScriptReference/PlayerSettings.html