in this great talk https://developer.apple.com/videos/play/wwdc2023/10111/ the code references usdz models to replace hands. e.g assets/gloves/LeftGlove_v001.usdz. Are these models available to download to explain rigging and how to make hand models (ideally in Blender )

Hi guys, I'm trying to make a test flight build (first time in a while) in Xcode 16.0 Beta for a visionOS 2.0 beta test. When I click Distribute App, It preps and creates the app but fails on the next step "creating app record..." with this code The operation couldn’t be completed. (DVTAppStoreConnect.ServiceBackendError error 1.) My account is old with a ton of certs, identifers, profiles etc. I've tied setting up a new one but that doesn't seem to fix the issue ( though I might have easily missed a step? ) Any help on how to solve this?