But I don't think that includes keyboard passthrough only. So it would be trivial to make a fully passtrhough app but not one where only the keyboard is visible. Unless you make that static and ensure that the keyboard does not move
> But I don't think that includes keyboard passthrough only.
It does for certain keyboard models[0]. You can bring them into VR without bringing anything else, and their position will be tracked in VR even if you move them.