We currently do not have a Unity VR tutorial, though we recognize that this is a gap in our learning content. However, I’d like to point you to our Cesium for Unity Samples project, which includes some scenes configured for VR on the Quest 2.
The first scene, VR01_Denver, has instructions for how to build the app to the Quest. You’re welcome to build on these sample scenes for your own projects!
Feel free to post on the community forum if you have questions or run into any issues. Several other community members have developed VR apps with Cesium for Unity, so they may be able to offer help as well.