Some Oreo devices are not getting Push Notification

Question

Samsung S8/S5/J2/Note3 are getting Firebase Push Notification successfully either app is killed, in background or foreground,

but In

Answer 1

In the Oreo, they introduce one new concept of channelization of push notification. You can read more about channelization here. Implement the notification for Oreo and above the bellow ore separately. You can refer the following answer to fix the issue.

I have fixed the issue in xamarin.android, hope this will work for you.