This can't be done, unfortunately. If I try to use the wheel first, I turn it on, then hit the "PS" button to start the console, but the PS won't play nice like that. It wants the dualsense first.
The wheel will just say "plug in to USB".
So, I use the dualsense to start the console, then get in to my profile, turn on the wheel, use it for my profile, and then go ahead and shut off the dualsense like you said, from the wheel as a controller. (Thank you for that, i forgot that was an option.)
Then I launch GT7 with the wheel.
The wheel is then recognized only as a G923. Double-verified, the wheel was always in G Pro mode.
The only way through this is to quit GT7, and make sure the dualsense is active and available. Restart the wheel. Restart GT7.
Convoluted, I know. But this is what's going on. Hopefully the details are of some use to you Rich!
Thanks!
Oh the one thing I didn't try was turning the PS on from the front-panel button first and then seeing if I could go straight to the wheel.