не активировать режим портрет на фото с фронтальной камеры 16 про макс

You may try some of these steps, please check after each step...

1. Sometimes, a simple restart can resolve temporary software glitches. Turn off your iPhone, wait for a few seconds, and then turn it back on.
   1. Restart the device. That's it.
   2. Still not solved --> Force restart iPhone - Apple Support
2. Corporate iPhone Profile Check and Removal Guide
   1. Is this your corporate iPhone? Then please contact the system administrator of your corporate
   2. If it is your device, in that case, do you have any profile installed by your corporate/organization/enterprise/School Management?
      1. Erase the profile added by you If you have installed a profile on your own --> Install or remove configuration profiles on iPhone - Apple ...
   3. Please contact the system administrator of the organization who provided the profile to you
3. Adjust Depth Control in Portrait mode: Select Portrait mode, then frame your subject. in the top-right corner of the screen. The Depth Control slider appears below the frame. Drag the slider to the right or left to adjust the effect. Take portraits with your iPhone camera - Apple Support
   1. With Portrait mode, the camera creates a depth-of-field effect. This lets you capture photos with a sharp focus on the subject and a blurred background. Use Portrait mode on your iPhone
   2. Go to the Photos app on your iPhone. · Tap any portrait to view it in full screen, then tap the Edit button . · Tap the Depth Adjustment button , then drag the ... Edit portraits on iPhone
4. If the issue persists, you can try resetting all settings on your iPhone. This will not erase your data but will reset all personalized settings to their default values. Go to Settings > General > Transfer & Reset > Reset > Reset All Settings and confirm the action. Note that you will need to reconfigure your settings afterward. All settings—including network settings, the keyboard dictionary, the Home screen layout, location settings, privacy settings, and Apple Pay cards—are removed or reset to their defaults. No data or media are deleted.
   1. Reset All Settings: Return iPhone settings to their defaults - Apple Support:- Return iPhone settings to their defaults
   2. You can return settings to their defaults without erasing your content.
   3. If you want to save your settings, back up your iPhone before returning them to their defaults. For example, if you’re trying to solve a problem but returning settings to their defaults doesn’t help, you might want to restore your previous settings from a backup.
   4. 
5. Make sure you have the latest updates installed.
   1. Update Over-the-Air (OTA) —> Update your iPhone or iPad - Apple Support (IN)
   2. Update using iTunes/Finder —> Update your iPhone, iPad, or iPod touch - Apple Support (IN)

If none of the above steps resolve the issue, it is recommended to reach out to Apple Support or visit an authorized service center for further assistance. They can provide specific guidance based on your device model and iOS version.