As far as I know, for most Samsung devices with compatible Samsung ELM Android Plus device agent running, the notification sound can be configured globally for all apps, but cannot be configured independently for any specific application deployed. 

As I don't have any Samsung J6 device with the latest firmware and device agent you are using,  I cannot do any test and verify if the function is still supported or not.

Hi VeresG

Thanks for your query.

Unfortunatley we do not have a script to change the notification sound and vibration for particular applications.

Regards

Thanks for your answers.