The Samsung device also has a stopwatch in the clock app, which allows you to measure the time, and the stopwatch also allows you to measure intermediate laps.

Note: The stopwatch continues to run even in idle mode (display off).

Android 10 (One UI 2.0)
Step 1:  Open the  Clock -App
Step 2:  Tap on  Stopwatch
Step 3:  Tap on  Start
  1. Open the Clock-App
  2. Tap on Stopwatch
  3. Tap on Start