Something under Windows Apps introduces the networking screen under OOBE (despite WiFi being available without it) and also enables Bluetooth. I'm guessing it will take me 2-3 more days of testing to find out.
Thanks gilius, appreciate the feedback.
Will review if that can be avoided or it's a hard dependency which should be linked to Bluetooth and description expanded.
Since Bluetooth is sort of a network, it's possible as that component is a broker/connection from apps to the functionality.
Infrared is already ticked. If I find out what else is needed I will post here - but for now it's low priority because it's just for acknowledging Bluetooth devices that are already connected and working.