iPhone 16 camera not working after iOS 18.3.1 update

I have an iphone 16, less than 3 months old. It has ios 18.3.1 installed. Just today the camera quit working. We first noticed it when trying to use video for a facebook messenger call and there was no video option. I started exploring why that might be and discovered that the camera was not working. It just has a black screen, you can still see all of the option buttons at the bottom but everything else is black.

I tried restarting it but it didn't help. At one point a box popped up that said the camera had unrecognized parts or something like that. I don't see that anymore. I also googled how to do a hard reset and I tried that and it didn't help. At one point while I had the camera screen open I tried tapping the different option buttons at the bottom of the screen and it started working again. However it didn't last long and it quit working again and trying the same thing has no effect now.

Any help would be appreciated. Thank you.

[Re-Titled by Moderator]