Anyone know how to set sounds for each individual app instead if the default? I've never had this issue previously before on other phones....
Usually that function resides within the individual app itself. On my S8 I set the notifications for Textra in Textra, Nine in Nine and GMail in Gmail.
Or go into apps>select the app you want to for example Email. Email>Notifications>New emails>Sound.
This is on an unlocked S8. Carrier version *might* be different.