Neptune should automatically prompt you to allow notification access, but here are the steps again:
If you get a "restricted setting" message, see restricted setting
Open the settings app.
Open Apps & Notifications.
Open the drop down.
Open Special app access.
Open Notification access.
Click Neptune Client.
Allow notification access.
If you get a "Restricted setting" message, follow these steps:
- Open settings
- Tap "Apps"
- Tap "App management"
- Scroll to "Neptune Client"
- Tap the meatball
- Tap "Allow restricted settings"
- Try to re-endable to notification listener permission again.