Re: Unable to turn on voice control
If this is the first time you will use Voice Control, setting it up first may be needed.
Apple support's online article Use Voice Control to interact with iPad - Apple Support may help you:
Eg: says:
"Before you turn on Voice Control for the first time, make sure iPad is connected to the internet over a Wi-Fi network. After iPad completes a one-time file download from Apple, you don’t need an internet connection to use Voice Control".
Apple support also has a video online that may help guide you:
https://www.youtube.com/watch?v=eg22JaZWAgs
All the best :-)