How to check if ipad has a physical (bluetooth) keyboard connected?

Is there some sort of API available that will let me check if there's a keyboard (bluetooth or wired(?)) connected to the ipad? I figured out a hacky way to do it by activating an inputfield and then checking if TouchScreenKeyboard.area stays zero but it feels like there should be an easier way to get the connected devices somewhere. TouchScreenKeyboard.isSupported seems to be only for checking if windows 10 is running on desktop or mobile device..