Small clock on lock screen disappeared?

[Toaor]

Hi guys, my S24+ had a small clock that appeared in top right corner when I close front cover, there's a small hole in case so I can see it.

But it's disappeared and I don't know why or how to get it back? 

[Tourbillon De La Vie]

Restarted the phone? Wipe phone cache

Resit the cover 

[code3]

Remove and add again. This happens because how heavy one UI is