How do I copy or edit my existing lock screen in iOS16? NOT create a new one.

Hey, pleshr. We’re happy to show you how to edit the Lock screen on your iPhone!

Personalize your iPhone Lock Screen - Apple Support -- This page of the iPhone User Guide provides these steps:

Edit a Lock Screen

After you create a custom Lock Screen, you can make changes to it.

1. Touch and hold the Lock Screen until the Customize button appears at the bottom of the screen.

If the Customize button doesn’t appear, touch and hold the Lock Screen again, then enter your passcode.

2. Swipe to the Lock Screen you want to edit, then tap .

3. Do any of the following: 

• Choose a wallpaper: Tap an option in one of the categories (for example, Featured, Suggested Photos, or Photo Shuffle) or tap a button at the top of the screen (Photos, People, Photo Shuffle, Emoji, or Weather). If you want to add a photo to your Lock Screen, see Add a photo to your Lock Screen.

• Add widgets: Tap the box below the time, then tap the widgets you want to add.

Select a photo style for a Lock Screen with a photo: Swipe to change the color filter (for example, Vibrant, Tone, Deep, and Vapor), the background for the photo (Natural, Black & White, Duotone, Color Wash, and so on), and the font for the time.

• Add a multilayered effect for a Lock Screen with a photo: Tap  at the bottom right, then choose Depth Effect (not available for all photos).

• Change the Focus: Tap Focus near the bottom of the wallpaper, then choose another Focus from the list.

• Change the style of the time: Tap Customize, tap the time, then select a font, color, and shade by tapping .

Feel free to get back to us with any questions or problems you may have.

All the best.