Hi , welcome!
Looks like a app or application your using , does it show up in your pull down notification panel?
Welcome to Android Central! I don't know much about this specific feature, but do you have WiFi Calling enabled?
It almost looks like a facebook friend request icon. Check in facebook and see if you have any pending friend requests.
Well, that's intriguing. I thought my S8 did WiFi calling anyway but having read this thread and looked up where the setting is, that was disabled.
I've turned it on now and that results in a phone icon with a smaller WiFi graphic to the right - just like the WiFi icon itself.
At the top, from left to right, it comes second - after the alarm icon and immediately before the WiFi one.
It doesn't look like a person, but a phone.
But then I have Android 7 and the look of the icon might have changed in a later version.
More info on changing limiting this: https://support.google.com/maps/answer/7667679?co=GENIE.Platform=Android&hl=en
Well, look at that! That's what it looks like! Nice catch!