My iPhone updated 16.5.1 now camera is not working

Hello Cindylee2262

For help with an iPhone camera not working properly, start with the steps in this specific article: If the camera or flash on your iPhone, iPad, or iPod touch isn't working

Remove case, accessory, or film and test

1. Remove any case, accessory, or film that might block the camera or flash or that places a magnet near the camera.

2. Test the camera by trying to take a photo.

3. Test the LED flash:

4. Try the flashlight in Control Center on your iPhone or Control Center on your iPad. On an iPhone X or later or an iPad, swipe down from the upper-right corner of the screen. On an iPhone 8 or earlier, swipe up from the bottom edge of any screen.

5. Tap the Flashlight button .

If the flash works only sometimes, open the Camera app and tap the flash button  to choose a different setting. 

If those steps don't resolve the issue, next it would be best to reach out to Apple Support directly. You can reach them here: Get Support

You can also find the support phone number for your region at this link: Contact Apple for support and service

Best regards.