So I created a snap for pyside2 using the content interface. This provides latest version of PySide2, alongside latest Qt bundled with it.
We have been using PySide2 at our company so I thought to make a snap to help reduce size of the actual project and any future apps that I plan to write.
I plan to continue maintenance of that snap going forwards.
Here is the snap: Install pyside2 on Linux | Snap Store (source: https://github.com/om26er/pyside2-snap) And a sample hello world app that you can build manually: https://github.com/om26er/pyside2-hello-world.
So lets start making apps for your desktop that work on all platforms 