I have What3Words working when I use send2car from the what3words app. However it does not work via Linguitronic in the car.

I currently have fup2/63 installed and my dealer is going to install fup2/81 (I believe) at my next visit in 2 weeks time.

Does anyone know if What3words via voice recognition is part of fup3 ? Or is there something else I need to do to enable this ?

You can use it without voice control as shown in this video. But if you want to use voice, you need to enable a separate Enhanced Voice Control subscription.