I keep forgetting your on Android. The authorization is an iOS thing. Apologies I am getting platforms mixed up.
For my own due diligence, have walked through our OneSignal integration guide here?
If onesignal is saying your device is unsubscribed, does that mean that they did indeed collect info on the device at 1 point then if they know that part? You might want to reach out to their forum/support and see if they have info on these portions of this as well.
What happens in OneSignal when you attempt a test notification to the app on device?
And if you’d pass me a recent successful build id and tell me where to find the notifications actions you’ve implemented in your app (Page/event), I’ll take a look. It gets a little trickier to research these on my own as you have a OneSignal side of this to trigger test notifications too but I will look and see if you’re setup correct on the Dropsource side of things.