It is now possible to enable the hidden floating keyboard on iPad while on iOS 10.3 within swift playgrounds. Earlier in January, an iOS developer found one handed floating keyboard that is currently hidden in iOS 10.3 beta. The same developer has made a swift playground that enables this very feature. It is currently working on all iPad tablets except for the iPad Pro 12.9.
The code is present within the iOS 10.3 update but is not available to the end users. It is being said that the Apple will be enabling this feature in upcoming iPad models.
It is being said that new iPad tablets will be released on April 4th 2017. If you are on iOS 10.3 beta right now, you can download the swift playground code from github.