keyboard iOS 13.4
There is a problem with keyboard on the screen after IOS 13.4 (IPAD PRO 10.5) update. A gap between the screen and a keyboard has appeared
iPad Pro 10.5-inch, Wi-Fi
With the keyboard visible on the screen, touch-and-hold the “keyboard” key at bottom right - and a menu will appear. Whilst the keyboard options are visible, slide your finger to the “Dock” option, then lift your finger from the screen.
Whilst the keyboard is docked, it remains anchored to the bottom of the screen. When undocked, you can move the keyboard up and down the screen. The remaining Split option switches the full keyboard to the split-keyboard.
I hope you find this to be helpful in resolving your issue.