That is the responsibility of the Merit Badge Counselor. Not a troop “overseer”. That really isn’t the intent of the program. Are some counselors going to be better or worse? Sure. Such is life.
For WilliamsburgScouter: I’ve worked as a District MBCC since 2013 and, since I couldn’t find one, have written my own PD reflecting what I’ve learned. It does not reflect if/how the MBCC’s role might change with Scoutbook. If you’ll connect with me at email@example.com I’ll be happy to send you a copy.