iOS 12 not available on iPad Pro 12.9
I have an iPad Pro 12.9 (2nd gen). When I go to Settings > General > Software Update, I see the message "iOS 11.4.1 Your software is up to date." I get the same message if I check for updates for the iPad through iTunes.
It's been over a week since iOS 12 was released. Is there any way to force the iPad to see the update? I think it may be related to having previously tested 11.4 on that iPad. Suggestions welcome.