Making a hands-free phone call through Google Home can be a convenience once you get used to doing it. However, hands-free calling was limited because you couldn’t communicate with automated systems that ask you to speak or press a number to choose a menu option until now. Android Police reports that this limitation has been overcome.
Google’s help page says it hasn’t been implemented yet, but after testing it myself, I can say it works. When you’re in a menu system, say: “Okay Google, press [number]”. Every subsequent command has to be preceded by “Okay Google” as you advance through the menu system.