I would like to ask how Huawei's mobile phone does it, that is, it will automatically become what it looks like in the picture after locking the screen.

Off-screen display: refers to the state that the mobile phone can display basic information such as time and weather when the screen is not bright.

Turn on the off-screen display: turn on the settings, click Security and Privacy > Lock Screen and Password > Turn off the on-screen display, and then turn on the ON switch now.