This article explains how to change the wallpaper that you see on your iPhone's home screen and lock screen. Use the same image for both, or choose two different images.
How to Change the Wallpaper on Your iPhone! (2023)
Start by finding the image you want to use on your iPhone. You can use a wallpaper that came pre-installed on your iPhone, a random image in your Photos app, or a photo you took with the camera. Here’s what to do:
Tap Settings > Wallpaper > Choose a new wallpaper.
Check out the wallpaper options. At the top of the screen, you'll find three types of built-in stock photos: