Hi, @Yukasayshello. Please can you follow these steps to see if you can get the S Pen sound effects back when using the app on your Tab S8+?:
Open Settings > Advanced features > S Pen > More S Pen settings > ensure that Sound is toggled to On. Please also ensure that you have your volume turned up.
Please update the thread and let me know whether you can now hear the S Pen sound when it's interacting with your tablet.
Ah, I see, @Yukasayshello. Do you happen to have Do not disturb switched on on your tablet?
If you do, I recommend creating an exception for Touch sounds. If you do have the feature switched on, the article below should assist you in creating the exception: