Open Settings
Tap Advanced features
Tap Side key
Set Press and hold to Power off menu
Open Settings
Tap Apps
Tap Bixby Voice
Tap Disable if available
Tap Force stop
Tap Notifications
Turn off...
Open the app drawer
Tap the three-dot menu
Tap Settings
Tap Hide apps
Select the apps you want to hide
Tap Done
To unhide, return to Hide apps and deselect...