Thanks! The github is still there, but since it is a fork of the Unreal Engine source, it is only viewable if your account has been accepted into the Epic Games organization. You can view the instructions on how to get access here: Downloading Unreal Engine Source Code | Unreal Engine 5.5 Documentation | Epic Developer Community
Once you have access to the Unreal Engine github, you should be able to view my fork that is linked in this thread too 