Hi drewster, were you ever able to get blend shape animations exported from Maya and working in Xcode?

Has anybody found a way to create blend shape animations and export to USDZ yet? I've given up on getting them to work by exporting to DAE (at least from a Maya rig). Seeing the same issue based on various threads I've found online: (https://developer.apple.com/forums/thread/101547 and forums.autodesk.com/t5/maya-forum/exporting-keyed-blend-shape-anims-for-scenekit-with-fbx-dae/td-p/7980397) it appears it's not currently possible.