Open XR Support for Unreal Engine 4.26

Hello,

I am currently working on a project with Unreal Engine 4.26 where I am trying to switch from the Oculus VR plugin to OpenXR plugin in order to implement Hand Tracking on Oculus Quest 2. Unfortunately I cannot find how to make use of that plugin at the very beginning.
In fact I disabled the Oculus VR plugin and activated the OpenXR plugin (or should it be the Oculus OpenXR plugin ?), as well as the Hand Tracking extension. Yet, I do not have access to the C++ scripts in the UE editor, and I don’t know what I need to do.
Does anyone know the answer ?

Thanks,
Paco