My iPhone keeps saying my camera isn’t genuine

That does not mean your phone has been hacked.

You will see an Unknown Part message if the camera installation is incomplete or if the camera:

• Was replaced with a nongenuine camera
• Was already used or installed in another iPhone
• Isn't functioning as expected

So, if you've never had the camera replaced, that warning probably means there is a hardware problem with your camera. Start here:

Genius Bar Reservation and Apple Support Options - Apple

Your phone wasn’t hacked. If you didn’t have any third party repairs done on it means there is a hardware failure and needs repaired. The 3rd bullet point Per About genuine iPhone cameras - Apple Support

• Was replaced with a nongenuine camera
• Was already used or installed in another iPhone
• Isn't functioning as expected