How do I control screenshot shutter sound on iPhone?

I would highly recommend that there should be some sort of way to control the volume of the screenshot shutter and,(my reason why is that I was in the bus right and I saw this picture someone posted so I wanted to screenshot it and it was so loud that it caused the entire bus to look at me and it felt so uncomfortable), but there are specific device tones that we wouldn’t mind hearing so I really hope that feature could be added or some sort of shortcut(available to public) to alter it

[Re-Titled by Moderator]