Spoiler: you can't directly! But there are three workarounds.
How To Turn Off Camera Shutter Sound On iPhone/iPad
How to turn off the camera shutter sound on Android
How to turn off camera sound on iPhone or iPad in 5 ways - iGeeksBlog
This is how to disable the shutter sound when using the camera on a Sa
How to turn the camera shutter sound off on a Japanese iPhone - Quora
How to Turn Off the iPhone Camera Shutter Sound
How to Turn Off iPhone Camera Sound (Japanese/Korean/Unrestricted)
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6 Ways to Turn off Camera Sound on iPhone - Guiding Tech
7 quick ways to turn off the camera sound on iPhone & iPad