Did you get this sorted? I know the following works on 11, and it wouldn’t surprise me if it worked on 10.
First unplug the Ethernet cable, and when it asks for WiFi, press “Shift + F10”. In the opened command prompt type “OOBE\BYPASSNRO”. This will make the installer go to the legacy OOBE (Out Of Box Experience). Finish setup, before finally connecting to the internet. Don’t worry you’re not doing anything dangerous. It’s a simple registry edit.