i get a sound notification , but when i open the phone it does not show any app notification??? Cant see what app is giving me sound notification but cant disable
Unfortunately it's going to be a process of elimination @Sam1965 to find the culprit.
Perhaps put the phone in Safe Mode which disables downloaded apps but leaves the stock ones working and then see what happens.
If it stops one or more of your apps are causing this.
🌈 Stay Safe 🌈
My advice comes from being a UK Samsung Phone Owner.
I have no affiliation with Samsung.
Current Phone ~
Samsung Note 10 Plus 5G _256Gb >_ Samsung One Ui 2.5/ Android 10.