IPhone7 Camera icon disappeared

Hey there, RevBettiann!

Thanks for reaching out in Apple Support Communities! From your post, it sounds like your Camera app icon is no longer on your screen. We'd be delighted to help with this!

It's possible the app was removed from your Home Screen but is located in the App Library still. Swipe left on your screen until you get to the App Library, then from the search field at the top you can search for the Camera app. If you see the app, touch and hold it until you get the option to move it.

For more details on how the App Library and Home Screen work together, check out the resource below:

Organize the Home Screen and App Library on your iPhone - Apple Support

All the best.