Turning off camera shutter sound for iphone 7 plus?

I want to turn off the shutter sound but also want to keep my ringtone/ notification volume up…

how do i do that?

No

In countries which allow shutter sounds to be muted then the phone settings may provide that option. But even in those countries the phones on sale are usually sourced from a foreign market where shutter muting is banned.

But most countries now insist by law that phone cameras must make an obvious shutter sound when used so most phones can no longer mute the sound.

Those laws exist to dissuade people from taking covert photos where they might not be permitted, such as in Courts of Law, or for perverts to take upskirt photos of strangers (there was an epidemic of that in Japan and India).