Hello kali4nia85,
Welcome to Apple Support Communities!
We want to help you customer your wallpaper on iPhone.
Use these steps to add a new wallpaper:
"Add a new wallpaper for your Lock Screen or Home Screen
- In the Settings app, tap Wallpaper.
- Tap Add New Wallpaper.
- Tap Photos, People, or Photo Shuffle to choose your own photo. You can also select a wallpaper from a category like Weather & Astronomy, Emoji, Collections, or Color.
4. If you want, you can customize your wallpaper further. Then tap Done."
You will see this screen each time, where you can 'Set as Wallpaper Pair' or 'Customize Home Screen'.
This Apple Support page has the full details: Change the wallpaper on your iPhone - Apple Support
If you don't like seeing this option, we welcome and encourage you to submit this feedback and any other feature requests here: Product Feedback - Apple
We hope this helps.
Cheers!