App lock not working?

I wanted to set up an app lock on my Huawei phone today. So with Face id. However, the whole thing only works once after that, it just doesn't lock anymore. Please urgently need help. Does anyone know what I can do?

What exactly do you need the lock for? Most of the time you have to tap the lock every time you use it

First, FaceID is iPhone

Secondly, this is the function when the app lock reappears which is set to unlock the phone by default. There should be a point in the app lock settings

Yes, Huawei has had a problem for a long time. If you leave the app then go to the list where the opened apps are and delete them from the memory.