From what I know, if you want them to test your application using the camera, you should choose the iPad Camera in your code and select Swift Playgrounds on iPad as your platform for them to test

I have the same question as you about locking the display orientation when developing using Swift Playgrounds. I know that locking display orientation is possible in XCode by manually tweaking the package.swift file, but in Swift Playgrounds I don't see the option to modify my package.swift file. So how do we go about setting the app orientation when developing using Swift Playgrounds?

I understand that views can be scaled based on screen size in SwiftUI but I am concerned about scaling background images as their resolution gets affected. Also this time I noticed that the submission form only gives two options to run the app playground - Xcode and Swift Playgrounds, so if I select Swift Playgrounds, will the playground be tested on iPad or a Mac?