I'm still just not quite sure what you are referring to. I'm very familiar with Android so maybe it's just a Samsung thing. But with my time with the S8 and Note 8 this year, what you describe seems like Samsung Connect. When I had those phones and don't remember seeing anything in the notification panel (other than the BT quick toggle) that showed my BT devices other than Samsung Connect.
When I drag down the notification shade... at the very top is the quick options, then if Samsung Connect is turned on, a row for Connect settings and a row for its devices, then starts the rows of notifications. I didn't have Samsung Connect turned on in notifications until we started talking about this, and it drags with it the row that says Samsung Connect with the settings button. So I'm confident what I'm talking about isn't Samsung Connect. Where Samsung Connect now is at, there was prior a row that listed the connected Bluetooth devices. This was really useful because when I get in my truck, I have to let the Note 8 connect to Bluetooth on the receiver before plugging in the Android Auto cable, or it disconnects from my Gear S3 when I plug in the cable. So it was a lot easier to just drag down to see that rather than going into the Bluetooth menu. If I didn't know I'd looked at it numerous times getting in my truck, I'd think maybe it wasn't there and I am just confused about something... but it was definitely there before and now its gone for some reason. An unsolved mystery!