When UIKit fits
Legacy code, a specific UIKit dependency, or a buyer requirement. If none of those apply, ask whether Expo or SwiftUI is a better fit for v1.
What we do not say
We do not advertise a UIKit specialist team or ship UIKit apps as the default portfolio. The apps we publish ourselves use Expo and React Native. UIKit here means: scoped build available, quote after scope.
Release steps after the build: TestFlight and App Store release.