How to use Speech mapping/voice input?

On the microsoft docs on voice input (Voice Input in Unreal - Mixed Reality | Microsoft Docs) it says to add the words in bindings under engine-Input. Then in a blueprint use “Input action your word—> Print string”. But Im not getting any print string when i speak my input action. Do I need to add an audio capture into my blueprint? Is there more to this than just adding the input in settings and then putting two nodes into a blueprint?

Did you find a way to make this functionality work properly as intended?
Can i use it to record voice without having to press any key?