Reproduction steps:
1. Create a new project from VR Template
2. Install XR Composition Layer via Package Manager (Window → Package Manager)
3. Disable VR Module (com.unity.modules.vr) (in the Package Manager switch to “Built-in“ tab to find the VR Module)
4. Observe the result in the Console window

Actual result: “The name 'XRSettings' does not exist in the current context“ compilation error appears in the Console window
Expected result: No errors in the Console window

Reproducible in: 2.2.0 (6000.4.0b1) 2.3.0 (6000.4.0b1 - 6000.4.0b6)
Could not test with:
- Editor: 6000.0.66f1, 6000.3.6f1, 6000.4.0a5, 6000.5.0a5 (unable to disable the VR Module due to dependencies from other XR packages, which cannot be removed as XR Composition Layers package requires them to be present in the project)
- Package: 2.1.0 and earlier (different error appears due to incompatibility between 6000.4 beta version and the package version)

Reproducible on: Windows 11
Not reproducible in: No other environments tested