Use a Trackpad to Control Your iPad
Before iOS 13.4, you could use your mouse or trackpad with your iPad, but the feature was limited. Now, the settings for your mouse and trackpad have a dedicated entry under General > Settings.
Connect your mouse or trackpad to your iPad using Bluetooth and open up the settings app to enable mouse support.
And this isn’t some dumbed down feature. The iPad supports a wide variety of gestures that you commonly use with a mouse or trackpad. You can left-click, right-click, click and hold, click, hold and drag, and a whole lot more.