Huawei p20 pro - no lock screen notification

[Android Central Question]

I wish to receive notifications from my messaging apps (e. g. normal text messages).

I have turned on everything in the notifications option to allow notifications on the lock screen, yet I still only receive a sound notification. My screen neither does turn on nor are there any notifications on the lock screen. Whatss app only shoes as pop up. The notification app neither works.

This is a pretty important issue, any help would be greatly appreciated.