If you are interested in a taste of the future iPadOS and are willing to risk some potential issues, you can join and participate in the public beta program with Apple. This program allows you to download a beta version, as it currently stands, and as it progresses to final release.
For example, you can start to use Stage Manager (shown above) to multitask and get things done with multiple overlapping windows.
You can go to iPadOS 16 Preview to learn more. To participate in the Apple Beta Program to try out more than the iPadOS preview, you can go to Apple Beta Software Program. There, you can learn about testing iOS, Ventura, WatchOS and more.
There are many new and improved features, including external display support, Stage Manager and drag and dropping files and apps between screens.
Participate in the program and help Apple fix issues and improve the software.