Getting a stereo "VR" view on my mac desktop

I’m using Unreal Engine 5.4 with the VR Starter Template on my mac, it is set up as a listen server for mouse and keyboard input.
VR “Quest” clients join and utilize standard VR controls. All this is working perfectly in the editor with no warnings or errors even if i launch from the editor as a standalone version: the server displays a typical PC game view, and VR clients connect as expected in VR. However, when I package the project as either a development or shipping build and run it, the server view shows a stereo view that resembles split-screen.

I’ve disabled all settings related to split-screen functionality. Can anyone provide insight into what might be causing this issue?
i also disabled the simple HMD plugin but when i do that the packaged game doesnt even launch.
Im not using any non standard plugins “nothing that isnt shipped with the engine”