Wallpaper selection

Hello Valkyrie1500,

Welcome to Apple Support Communities!

We want to help you change the Lock Screen and Home Screen wallpapers on your device.

Long press the screen until you see the option to unlock your iPhone. Then you can use the Customize button to view the two different wallpapers.

See more here:

"Make a new Lock Screen

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. Tap  at the bottom of the screen.

The Lock Screen wallpaper gallery appears.

3. 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.

You can also change the font and color of the clock by tapping the time. (See Change the clock style on the Lock Screen.)

For some wallpapers, you can change the background color and choose other options by tapping  at the bottom right.

4. 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."

This Apple Support page has the full details: Create a custom iPhone Lock Screen - Apple Support

This should help take the proper steps to change the wallpapers.

Please let us know if you have further questions.

Cheers!