Metal debugging on iOS simulator

Wondering is Metal debugging not supported with iOS simulator?

When running a Metal app with Xcode on a real iOS device, by clicking on the camera icon on the debugger toolbar, the Metal debugger (a.k.a. Frame Capture Debugger) appears on screen for further investigation of issues with Metal shaders. That works with real iOS devices:

https://developer.apple.com/documentation/metal/shader_authoring/developing_and_debugging_metal_shaders

However when running the same Metal app with iOS simulator, the camera icon is grayed out, hence Metal debugger is unavailable for some reason. So is this simply not supported by the simulator or has there something else to be set up?