if by voice bot, you mean, user beeing able to send a voice not and be proposed actions or displayed message, the answer is yes. you can use the card Wait for input, to get the user add a file or a voice note, up to you then in an execute code to manage the data (especially on whatsapp, the botpress documentation on this card, shows you how to get the file or voice note document. then with server code (nodejs for example) you can get the address, use an api to transcript back to text and do whatever you want with it