'Change from 2D scene to 3D-VR-scene at the same project

I am programming in Unity 2019.4.31, and I want to start my 3D-Unity-VR-app first with 2D-scene and then at the second scene change back to VR-3D mode.

I saw this link Unity VR scene to 2D scene, but it didn't help to me because when I debug my project, I saw that the devices that were loaded were: CardboardDisplay, CardboardInput.

I tried to add "None" in the XRSettings first in order to start my game in 2D-scene, but it didn't help either.

Can anyone please help?



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