Beginning April 24 releasing on the App Store requires using Xcode 16, iOS 18 SDK. https://developer.apple.com/news/upcoming-requirements/?id=02212025a
Xcode only offers simulators for iOS 15. I had not been able to install and use previous versions. Does it imply iOS 15 is the minimum target allowed?
Xcode 16 supports deployment targets down to iOS 12. Our support document has these details for your future reference!
— Ed Ford, DTS Engineer