I built a simulation of TonyPi in MuJoCo. Here is a video comparing sim to real. These play the .d6a (Action Group) files on TonyPi and then on the simulator. https://www.youtube.com/watch?v=VVifUPAAEM0
Python files and models are on Github and can be used develop controllers without relying on hardware: GitHub - pab47/TonyPi: This is a repositary for simulation/hardware code for Hiwonder humanoid TonyPi · GitHub