iPhone 7 camera

First, force quit the camera app—>How to force an app to close on your iPhone, iPad, or iPod touch - Apple Support

If that doesn’t fix it restart your phone—>Restart your iPhone - Apple Support

Still not fixed? Contact Apple Support—>https://getsupport.apple.com

After upgrading to iOs14, if any third-party apps (e.g. Instagram) can no longer access your iPhone's Camera, try these steps:

1. go to Settings > Privacy > Camera

2. see if the third-party app is set to "Disabled" (greyed out)

3. if that's the case, then change it to "Enabled" (green).

#ios14