I am able to easily substitute my own model with blendshapes into your Unity sloth/ARKit example but the Blender shape-keys do not animate (yes, manually with Unity sliders)--the tracking is good, and the model has animated before with a Kinect-- the blendshapes list fine on the skinned mesh renderer, and i have tried both the labeling you include for blendshapes on the sloth, as well as using the Apple Face-Anchor labels for blendshapes. I have tried .fbx export from Blender as well as directly importing the Blender file to Unity. All your examples run fine on my phone (Face Blendshape scene and Sloth Blendshape scene). I am using IPhone X, Unity 2019.1.4, and X-Code 10.2.1. Any suggestions, please??