Hi Del - not sure if Andy's already posted all you need but there's some info and links to instructions to do it here (the update itself worked pretty easily for me) https://zwiftinsider.com/neo-bike-steering/
Thanks Paul
Yes Andy had posted it earlier.
Anyhow, success! It works!!
I’d already done a firmware update on the bike - it just wasn’t the right one!
I had to manually update the IOS app, then I had the option to update the bike firmware to the version supporting steering. The IOS app now supports the Bike Plus features, such as the different manufacturer gear options.
Did a test ride that must have lasted at least 50 meters, ended the ride and Zwift asked me what I felt about my steering experience? 🤣