How do I upload different versions to App Store?

I would like to upload 2 different versions to App Store. One version that has the viewport 4:3 ratio that is on iPad and one version that has the viewport 16:9 ratio for mobile devices. Ultimately I would like to upload a version with the viewport 19.5:9 ratio as well that is on Iphone X for example. I want to do this to make sure that I fill out the screen on the different devices.

Is it possible to upload several different viewport size versions to the App Store? Has anyone here done this before or did you solve it in some other way? I have never uploaded anything to the App Store and I don't seem to find any information on this.

You don't do that, it should be one application that supports both aspect ratios. More info here : construct.net/en/tutorials/supporting-multiple-screen-77

— Thank you so much! This solved my problem. I went with the Scale Outer and Cover options :)

Great! :)