I don’t think it’s the right tool for interviews. First, you are only supposed to hold eye contact 50-75% of the time, holding it during the entire interview could come across as awkward. Eye contact also means looking at the camera rather than the screen. This is important while speaking, but if someone else is speaking or trying to show you something on their feed, then “holding eye contact” would mean not looking at what is being presented.

Maybe if you really struggle with looking at the camera while speaking the tool can be helpful but I don’t think it’s an advantage. Any attempts of toggling it would take too much attention, people already struggle with muting and unmuting their microphones.