Re: Can I See but not hear Notifications while on focus mode?
There seems be various possibilities, you might want to browse through Apple Support's articles below, and see what is actually available or will work best for you:
How to put your iPhone on vibrate, ring or silent mode – Apple Support
Adjust the volume on iPhone – Apple Support
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How to:
Use notifications on your iPhone or iPad - Apple Support
Change notification settings on iPhone – Apple Support
View and respond to notifications on iPhone – Apple Support
Eg: says:
"Mute notifications for an app: Swipe left on the notification or group of notifications, tap Options, then tap an option to mute the app’s notifications for an hour or a day. This sends them directly to Notification Center and prevents them from appearing on the Lock Screen, playing a sound, lighting up the screen, or presenting a banner.
To see and hear these notifications again, swipe left on the notification in Notification Center, tap Options, then tap Unmute".
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How to: Change iPhone sounds and vibrations – Apple Support
All the best :-)