Universal IL2CPP speedhack using IL2CPP's exports.
Simply build it and inject it using any injector, if the console states that IL2CPP initialised then you're good to go! You can just press F1 in-game to toggle speed on/off.
You need Unity installed. The include path is here: C:\Program Files\Unity\Hub\Editor\VERSION_NUMBER\Editor\Data\il2cpp\libil2cpp