Repositories like goofwear/Egg-NS-Emulator-Decompiled are community-made attempts to reverse-engineer the app's code.
Here is the proper story regarding the Egg NS Emulator and its tumultuous relationship with GitHub. egg ns emulator github work
Project title egg-ns-emulator
Because GameSir funded development. The controller contains a hardware chip that the emulator checks for. egg ns emulator github work