If you bought a Google Pixel 6 phone that is not a global version, chances are that you will get a camera shutter and screenshot sound. Since these are hardcoded into the firmware, you will be able to get rid of those if you convert Google Pixel to global version.
Pre-requirement for this is rooting the Google Pixel 6. Then, type in these commands.
adb shell
su
dd if=/dev/block/by-name/devinfo of=/sdcard/devinfo.img
Then, quit the adb shell and type in this command.
adb pull /sdcard/devinfo.img
Keep this file as backup and open a hex editor to do some hex edits. Open devinfo.img file and find GR1YH. It should say 0x000000F7 > edit it to GB7N6 and save this file as devinfo_modified.img
Type in these commands.
adb push ./devinfo_modified.img /sdcard/
adb shell
su
dd if=/sdcard/devinfo_modified.img of=/dev/block/by-name/devinfo
Reboot. You just converted your Google Pixel 6 to Global version. This is permanent and if you want to revert back for some reason, just follow the steps in reverse.