Until fairly recently, if you opened the PulseAudio volume control app while in a Teams call, the volume slider for the call would be labelled as Skype. That's

Until fairly recently, if you opened the PulseAudio volume control app while in a Teams call, the volume slider for the call would be labelled as Skype. That's a name that the sound-producing software hands to PulseAudio, and is reasonable evidence that Microsoft basically ripped the back-end out of Skype and shoved it into Teams and forgot to change what it thought its name was.