@todaymorning04 After taking a look at your picture, you’re all good and have no need to worry! That is in fact how it should look.
The black bars on the side of the picture may have been throwing you off, as they do accentuate the fish eye look you see. This is because the image the Doorbell Pro gives is in an aspect ratio of 16:9 for the image size, and your device’s screen may be larger and have an image size that can show up to 21:9 or higher as the aspect ratio. Just wanted to give you that little extra bit of information if that helps clear it up for you!