The iOS Sidekick allows artists and animators to add ARKit facial capture to VR avatars when playing VR MocapFusion.
The Sidekick app streams facial expression blendshapes data to VR MocapFusion for adding real time facecapture to avatars. With SteamVR full body tracking it is possible to record full body avatar motion capture with face capture and can be exported to Blender. Or use the face capture when live streaming. With several plugins available for live streaming using Unreal Engine, Unity or Blender.
This app requires running VR MocapFusion on a PC to receive the motion capture data and can be downloaded from Steam: https://store.steampowered.com/app/1540000/Mocap_Fusion__VR/