Can you please share your solution?
I'm having the exact same problem. Phone (also Samsung) works fine Tablet makes no sound either by alarm nor timer....
@Members_drYVkDd: Please try heading to the Clock app > Select the Alarm tab > Tap on an existing alarm, or tap the '+' symbol to create one > Alarm sound > On (toggle the switch to the right) > Ringtone > Select your preferred option, then adjust the slider at the bottom of the screen to your preference > Go back to the landing page > Save.
Now, tap the 3 dots in the top right > Settings > Vibrate for alarms and timers > On > Timer - Sound (On) > Select your preferred timer sound, and adjust the volume slider at the bottom of the screen.
Finally, close the Clock app and head to Settings > Sounds and vibration > Sound mode - Sound > Volume > Make sure your sliders are at a suitable level. You should also check Settings > Notifications > Do not disturb, and toggle this off if it's active.