Hello again @mazayo,
The app is in fact not available.
You can find some more info in other topics of this forum to know what has been used, for example in Oculus Quest 2 Teleoperation.
Everything can be achieved through gRPC for the data exchange. The server side is the simulator, you can find all the messages and services in reachy-sdk-api on Github, and you have to create a client side for the teleoperation app using these same messages and services.
Then in order to get the inputs of the VR headset and controllers, you can add a VR plugin in Unity (SteamVR plugin, Oculus Integration, XR-interaction-toolkit,…), and retrieve all the info you want that way to send them through gRPC to the simulated robot!
Best regards,
Gaëlle