You can adjust alerts one app at a time. The exact options and menu names depend on your TECNO model and HiOS version.
Start with an unwanted alert
Swipe down to see your notifications. Touch and hold an alert, then open its notification settings. You can turn off that app’s alerts or adjust individual categories if the app supports them.
Review apps in Settings
Open Settings and search for App notifications. Select an app to see its controls. Use a silent option, where available, if you want to keep an alert without a sound.
Protect your lock screen
Search Settings for lock-screen notifications. You can choose to hide sensitive notification content while the phone is locked. This is useful for messages you would rather read after unlocking.
Reference: Google’s Android notification guide.
