the Always On Display of the Samsung device can be personalized with limited settings. for example, we can edit the clock. there are different designs available, including analog or digital clocks, a choice of colors and, if desired, a calendar.

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Lock screen
Step 3:  Tap on  Always On Display
Step 4:  Tap on  Clock style
Step 5:  Tap on desired  Clock Type
Step 6:  Tap on  Colour
Step 7:  Tap on desired  Colour
Step 8:  Confirm with  Done
  1. Open the Settings
  2. Tap on Lock screen
  3. Tap on Always On Display
  4. Tap on Clock style
  5. Tap on desired Clock Type
  6. Tap on Colour
  7. Tap on desired Colour
  8. Confirm with Done

Samsung Instructions