Open Settings on your iPhone
Tap Notifications
Tap Show Previews
Select When Unlocked or Never
Open WhatsApp
Tap Settings
Tap Notifications
Turn off Show Preview if available
Go to Settings on your iPhone
Tap Notifications
Tap WhatsApp
Turn off Allow Notifications if you want no WhatsApp alerts
On the lock screen, keep the phone locked to prevent names from showing
In WhatsApp, mute specific chats if needed
Use Focus mode to limit notification details
Check Face ID and passcode settings for notification preview options