Update an older version of an iOS app?

I know the short answer is, no, you cannot update an older version of your app… but it got me thinking….

could you make a new version of an app that supports older iOS versions and then quickly release another version of the app that supports iOS 16+ only?

Wouldn‘t this effectively allow you to make a new version for for iOS 12 devices and still allow you to have iOS 16+ features that are needed for the current version?

one of my apps needs features found in swiftUI (iOS 16+) but I’d like to update an old version that was not on swiftUI.