Update iOS to app minimum for testing

Our app framework was set to a minimum of iOS 12 - however we have decided to up this to 13. I have managed to keep an iPhone 6s set to iOS 12 so we can test on our minimum supported, however would now like to update to iOS13 - but am only really seeing options to update to 15 (which we have another physical device on already).

I have done some research and found some loose answers, none of which correctly paint the picture for me - hence why I am reaching our to the apple dev community. From what I can see I can get images for recent older iOS builds, but not older ones, but not 100% sure on this.

I am downloading the iOS 13 simulator image to do some tests now, but would really prefer it to be on a physical device if this is possible.

Any help or advice is appreciated

Update iOS to app minimum for testing
 
 
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