As far as I'm aware its set up to give an indication using the led light colours although yours is a good idea.
I would suggest to use the Samsung Feedback option in your Samsung Members App / Samsung + App.
I haven't seen a 3rd party app. 😞
Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
