adb – Disable Audio Notifications on Android 10

I have a Samsung Galaxy S20FE, running Android 10 and One UI 2.5. Previously on my Galaxy S8 I had the ability to toggle audio and vibration independently for notifications on a per-app basis. This meant, for example, that I could have Facebook Messenger only vibrate for messages, and not chime unless I was tagged in a group chat.

I have spoken to a Samsung representative today, who told me that this feature has indeed been removed. I would like to know if there is a way (using ADB, for example) to forcefully re-enable it myself.

I have done some research which has come up fruitless, and I would appreciate any and all help.