[lozenge]

I have a Samsung and it doesn't show what channel a notification came from. Probably because of the amount of crapware Samsung bundles.

[cypressious]

It shows, though it's a bit obscure. Long press the notification, then press notification settings. It will scroll you down and highlight the notification channels item. Press on it. After a second, it will highlight the channel the original notification was belonging to.

[JohnFen]

That's not "a bit obscure". That's almost completely hidden.