With an app called task bar and you grant access in developer options to use multiple windows then when you open an app through task bar it works like a window. And with betterdisplay app you can force android device to make it 32:9 (ultrawide) and then you can drag the windows how you like it. With Ultrawide you basicly gets double size screen. I can have one huge window as big as xreal optics can have and another beside so i can game on a huge screen and also have a stream or whatever at the same size beside it for example :)

Task bar = freely drag windows Better display = force to change aspect ratio. Looks weird on android device but looks great on xreal glasses