Camera shutter sound mute in iPhone XR

As I have already said in my post Model No/ MT0G2J/A ----> "J" means made for Japan and sold in Japan.

You might have got it from from someone in UAE. Products sold in UAE will have "AB" in place of "J"

Products sold in UAE will not have FaceTime, yours will have FaceTime. --> Use FaceTime with your iPhone, iPad, or iPod touch - Apple ...

Purchase Apple Products from an Apple Online Store, Apple Retail Stores, and many Apple-authorized resellers and wireless service providers.

There are many countries where putting camera shutters to silent is illegal (e.g. Japan)

Hence if you have bought an iPhone from Japan or any of these countries, you cannot put it off, it has been designed specific for the country

MWHM2J/A - "J" indicates it is designed for Japan