Update - Nexus VR Character Model has a preview for supporting this. However, review the limitations before using it in a game. Due to issues with the initial release of AvatarGestures and missing features in Nexus VR Character Model, this is not ready for use in live games.
I actually had this already enabled in Nexus VR Character Model, but Roblox’s default camera doesn’t care about it. Immersive roller coaster and some vehicle experiences would need to implement this themselves. 
It’s out of scope of the announcement, but I’d love Roblox to support VRTiltAndRollEnabled in the default Classic camera. While not rotating the camera is good to prevent motion sickness, your roller coaster/plane/spaceship doing a barrel roll while you are folding your neck into your body is really immersion-breaking.