Hi coloradomomma,
Thanks for reaching out in Apple Support Communities and congratulations on your new iPhone! It sounds like the wallpaper you used on your previous device is appearing as a white background after changing devices. I know how important it is to be able to customize the wallpaper on your device; I'd like to help. First, I'd recommend trying these steps:
Do you continue to see a blank background when you choose this photo?
Were you using a "Live Wallpaper" on your previous device? I ask because Live Wallpaper isn't supported on iPhone 11.
Was this something you purchased from a third party app?
If I've misunderstood and you're experiencing something different, please feel free to reply with additional details.
Best Regards.