If you are using iTunes 12.7, file sharing is still available. It is a the bottom of the left sidebar when you device is connect and selected. If you didn’t transfer the files to your computer, that’s not going to help anyway, but just in case.
About File Sharing on iPhone, iPad, and iPod touch - Apple Support
I assume that you are looking in the Files app for the Documents in Pages. If you try to move or copy the files, I also assume that you do see them on the iPad.Have you tried restarting or force restarting your iPad?
To force restart your device, press and hold both the Sleep/Wake and Home buttons for at least ten seconds, until you see the Apple logo.
.... your profile shows iPad 2. iOS 11 does not run on an iPad 2.