“ According to code seen by 9to5Mac, Apple is set to roll out rich system-wide support for mouse cursors with iOS 14. Apple added rudimentary compatibility with external mice in iOS 13 Accessibility settings, but iOS 14 (iPadOS 14) will make it mainstream.”
https://9to5mac.com/2020/03/09/sophisticated-mouse-cursor-support-coming-to-ios-14-new-ipad-smart-keyboard-models-with-trackpad/