How to rotate an Xcode-built iOS app running on a Mac

I currently have an app on the App Store which has functions that work in portrait and other functions that work only in landscape mode. It autorotates much like camera does.

I built it to test on Xcode 12 beta 3 on my Mac, but cannot see a way to rotate it to test in landscape mode. There are no visible buttons, and Ctrl-arrow does not rotate it like it does in Simulator.

Any ideas?
Bump - like to know this too. Given Apple Silicon will be able to run iOS apps, my app will have different behavior based on Portrait or Landscape mode.
I was playing around with this and found that I was able to rotate an App created for an iPad by double-clicking the title bar on a Mac Mini M1. I do not know if this is documented but it worked for me.

I have the same issue, apple silicon mac seems can not run iOS apps at landscape mode..

How to rotate an Xcode-built iOS app running on a Mac
 
 
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