Disable Foveation for ImmersiveSpace?

Does anyone know how I can disable foveation for an ImmersiveSpace? I'm aware that I could use a CompositorLayer and my own Metal rendering to control foveation, but I'm hoping that I can configure an existing/underlying LayerRenderer (or similar) to disable it for an immersive scene.

Or if there's another approach I should be taking, any pointers are appreciated. Thank you!