In Xcode 16 RC and Xcode 16 the minimum deployment drop down menu to select which version is iOS you want to deploy to is missing. I filed feedback on it for both the release candidate and the release version. I'm just wondering if this is happening for everyone. I'm still using Sonoma 14.6.1.
FB15149078
From Xcode 16 release notes > Project Management > New Features : The Xcode target editor now only shows major OS versions in the list of suggested deployment target versions. (118566415)
You can change the value by clicking on the iOS button. Xcode presents an editor:
Click on a value in the editor to change it. After changing the value from iOS 18 to iOS 17.4 for both build configurations: