Hi Gabriele,
For your information: Actemium (actemium.com, Haralt Tromp) and Honewell (honeywell.com, Mark Schouten) offer GWS voice picking for Dynamics 365FO WHS. It can be connected to any D365FO environment with WHS, without a footprint on D365FO. Basically it uses the same logic as the current WHS app, but then fully voice integrated.
Best regards, Frans Hoogenraad