Apple will release iOS 13.4 and iPadOS 13.4 to users on March 24 and trackpad support for the iPad lineup is going to be part of it. Up until now the iPad has been able to work with external trackpads and mice through an accessibility feature, but will full-on support them system-wide with iPadOS 13.4. Apple has confirmed that all iPads will be able to work with Apple's Magic Trackpad and Magic Mouse, while the 2019 iPad Pro 11-inch and Pro 12.9-inch will both support the new Magi Keyboard, announced today, with iPadOS 13.4. The Magic Keyboard will ship in May and cost $299 and $349...
Source: https://www.gsmarena.com/apple_will_seed_ios_134_and_ipados_134_on_march_24_ipads_getting_trackpad_suport-news-42089.php