What is Xcode previews
What is Xcode previews
iPhone 13, iOS 16
Question marked as
Xcode is an integrated application development environment (IDE) commonly used for app development for Apple platforms, and the previews mechanism can be used to preview apps in development, and iOS includes integrated support for assisting with on-device testing and application development, and support for that becomes available when Developer Mode has been enabled.
Previews in Xcode | Apple Developer Documentation
Mastering Xcode Previews - WWDC19 - Videos - Apple Developer
Since you're probably not developing an application for deployment on your iPhone, there's probably more to the question or the concern here. If so, what might that be?