I mean, I'm not aware of centralized tools built in to Teams that are used to systematically evaluate people, and if they exist, I wouldn't necessarily expect they are being exploited by my organization.
What I was referring to was simply that there is a little color coded status symbol by a person's chat icon, which is green if they are active, and turns yellow if they are not doing much.
However, if you have a meeting or appointment on your calendar, or you are presenting/videoconferencing it goes to red, so you really don't have to be green or yellow any more than you want to.
Technically you are correct about your awareness. My apologies.
But in context, MS Teams has extensive dashboard analytics, some of it promoted under the guise of "employee wellness" but mostly used for command and control and monitoring, and there are several addons that add even more extensive tracking and analytics, e.g. ActivTrak.