What do you mean by dual windowing system? If you mean having multiple windows open at the same time the iPad does support that either simply having two windows sharing the screen (Split View/Slide Over), or having multiple windows on the built-in and external monitor that you can move around (Stage Manager).

I would love to be able to run a linux VM on my iPad though, it would make travel so much simpler for me. I know there are hacks to get it going with UTM etc. but there are too many compromises for my use case.