press power button gives black screen

[user4qpKJU2Wwh]

galaxy s23 ultra.
in the past when I quick-pressed the power button putton my phone would go to a dimmed screen. it had a black background but I could see the clock and the notification icons. then something happened - I don't know what - and now when I quick-press the power button the screen goes completely black.

where is the setting to get to back to the previous dimmed screen?

[user4qpKJU2Wwh]

thankyou but in step 1 there is no such thing as "Tap to Show” or "Show for 10 seconds”  in my settings.

and in step 3 there is no such thing as 'Lock Screen Timeout' in my settings

I have Lock Screen & AOD > Always On Display enabled