Looking at some of the latest release notes, it appears that lowest supported version is iOS 15.0 for all versions of Xcode 16. Considering that Xcode 16 is the minimum version for submitting apps to the App Store, I would assume that means that Apple expects apps to be on 15.0+.
However, knowing that you can manually override this setting in Xcode, there seems to be a lack of clarity on what the true minimum is. Looking at the App Store, it appears there are some apps that can go back as far as iOS 12.0.
Is there a definitive way to know what is the true minimum that the App Store accepts?