Seems like it varies from school to school, but if it is the kind of zoom where you can’t turn your camera on or get called on, just sign in and listen. If it is expected for you to interact with people then go if you aren’t at work. I would only start gambling with it being a school that doesn’t care after you have an acceptance.
and to be clear, this is irrelevant to the question of should schools be caring about this stuff. I know for a fact at least one does :/