This issue also comes up if motherboard apps are pre-installed or have been installed out of recommendation, espesically one catered towards gaming. My TUF motherboard, for example, has an AI noise cancelling engine that starts by default. Simply uninstalling it stopped it popping up. However for any mic activity it will still pop up, gets pretty annoying.
I am not concerned about the 'security' of my microphone when it comes to icons being an eyesore. I've installed third-party appearance applications and I prefer to not let Microsoft ruin the presentation out of concern for my security. I'm sure some people would like its presence, however it's far better to enable people to have the decision whenever they would like the extra step of safety. In this case, I would very much not have it.