As mentioned in this thread [SOLVED] IC Pro ipad & cubase 9.5.1 & windows 10 not connecting - Mobile apps - Steinberg Forums I am still able to use both Nuendo 7.1.40 and 8.1 and Cubase 9.0.40 and 9.5.21 on Windows 10. There is no general issue here.
iPad running on iOS 11.3