https://techcrunch.com/2020/03/24/apple-releases-ios-and-ipados-13-4-with-trackpad-support/

Apple has released software updates for the iPhone, the iPad, the Apple Watch, the Apple TV and the Mac. The biggest changes are on the iPad. Starting today, you can pair a mouse or trackpad with your iPad and use it to move a cursor on the display.

Apple unveiled trackpad support for iPadOS when it announced the new iPad Pro last week. While the company plans to sell a new Magic Keyboard with a built-in trackpad, you don’t need to buy a new iPad or accessory to access the feature.