I am bringing this one forward as I think there is a need here. Even if a merit badge is completed, the progress, specific dates when requirements were completed are valid information to have noted. Understand the limitations of the number of requirements that can show but this is already an issue with partials which is where you really have an issue anyhow.
Our advancement chair spends time validating information and just getting a card from a counselor via ScoutBook that says they did it all on one date does not always look legit. Especially if they have been working with them for months on requirements that have the time factor as part. And the back of the card has no markings.
Side suggestion, maybe at minimum, cross out the back of the card with a completed date and signature of the counselor just to put something back there.