Snapchat has announced a new feature for iPhone users, allowing them to launch the app's camera directly from their lock screen. With iOS 18 or later, users can replace the flashlight or native camera shortcuts at the bottom of the lock screen with Snapchat camera shortcuts. This means that users can quickly capture moments by tapping on the lock screen and taking a photo in "Camera Only" mode.

Source: https://www.theverge.com/2024/10/24/24278353/snapchat-iphone-lock-screen-ios18-widget-availability