With iPadOS 13.4 Apple introduced proper trackpad support. While some apps don't work with it yet, like Spark which won't scroll at all, many apps are totally fine when using a trackpad.
Let's take a look at some of the features of trackpad support in iPadOS 13.4
One surprising things for iPadOS 13.4 is the different between bugs for a mouse and for use with the Apple Magic Trackpad. Ever since we've had mous support introduced if your mouse is connected before your keyboard you loose key function like CMD+Tab to switch between apps while you're in an app, or CMD+Space to bring up Spotlight. This bug doesn't exist if you're using the Apple Magic Trackpad. Even if your keyboard goes to sleep and you use the cursor via the trackpad before you wake up the keyboard, you will still get the system level keyboard functionality you expect.
To catch my thoughts on a few different trackpad accessories watch the video above.