Iphone 11 & IOS 16 - lock screen customisation not working

Hello Sniffergoal,

Welcome to Apple Support Communities. 

We understand you are excited about the new features for iOS 16. Please use the steps here to personalize your Lock Screen as listed here: Personalize your iPhone Lock Screen - Apple Support

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.
• Tap at the bottom of the screen.
• Tap one of the wallpaper options to select it as your Lock Screen.

For some wallpaper choices, you can swipe left or right to try different color filters, patterns, and fonts that complement each other.

To customize a photo on the Lock Screen, see Add a photo to your Lock Screen, below.

The Lock Screen wallpaper gallery appears.

• Tap Add, then do one of the following:

Choose whether to use the wallpaper on both the Lock Screen and Home Screen: Tap Set as Wallpaper Pair.

Make further changes to the Home Screen: Tap Customize Home Screen. Tap a color to change the wallpaper color, tap to use a custom photo, or select Blur to blur the wallpaper so the apps stand out.

Let us know if you have further questions.

Take care.