Hello Coldest,
Thanks for reaching out to Apple Support Communities. We see you're having some questions about issues with your device since updating, and we'd like to help. With your sound issues, you may find help here: If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support
Follow these steps:
1) If your device has a Ring/Silent switch, move the switch forward—toward the device's display—so that orange isn't showing. If you're using an iPad, you can also swipe down from the top-right corner to open Control Center and make sure that Silent Mode is off.
2) Open Settings > Focus > Do Not Disturb and make sure that Do Not Disturb is off.
There are some steps you can try on your own, too:
If you prefer, here are some more steps you can try on your own. After following these steps, you might still need to contact Apple Support to discuss service options.
1) Remove all screen protectors, films, or cases from your device.
2) Check the speaker opening to see if it's blocked or dirty. On iPhone only, make sure that the receiver isn't blocked or dirty.
3) If necessary, clean the speaker or receiver opening with a small, soft-bristled brush. Make sure that the brush is clean and dry.
4) Go to Settings > Sounds (or Settings > Sounds & Haptics), and drag the Ringer and Alerts slider back and forth a few times. If you don't hear any sound, or if your speaker button on the Ringer and Alerts slider is dimmed, your speaker might need service.
5) If you hear sound, try making a call with your iPhone and turn on speakerphone. On iPad or iPod touch, make a FaceTime call. If you still can't hear, or hear static or crackling, then your network or reception could be the issue. Try to call again later, or from a different location.
With your camera issues, you may find some assistance with the following steps:
If the camera or flash on your iPhone, iPad, or iPod touch isn't working - Apple Support
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:
1) 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.
2) Tap the Flashlight button 
.
If the flash works only sometimes, open the Camera app and tap the flash button 
to choose a different setting.
Let us know if any of this helps.
Regards.
