Realme
Show or Hide Lock Screen Notification Content auf Realme
Realme UI separates two things that often get confused: whether a notification arrives at all, and how much of it appears on the lock screen. The lock screen notification setting only controls the second part.
By default, most Realme phones show the app icon, sender name and message preview directly on the locked display. That is convenient for checking a chat without unlocking, but it also means anyone picking up the phone can read the same preview.
To change this, go to Tap on Settings ➔ Tap on Notifications & status bar ➔ Tap on Manage notifications ➔ Tap on Lock screen notifications. From there, choose between Display title and body, Display title only or Do not show.
Display title and body shows the full preview text. Display title only keeps the sender name visible but hides the message content. Do not show removes the preview entirely, though a generic notification badge still appears so you know something arrived.
This setting applies system-wide across apps. If you need different privacy levels per app, check that app's own notification settings instead, since Realme UI does not offer a per-app override for lock screen previews at this level.