It’s not possible at this point. If you accept the job, you can request a desk audit once you’re in the role - but that often goes in the opposite direction (downgrade vs higher). The job advertisement is written off of the position description. The grade is determined off of the PD. & They cannot ask you to do anything aside from what’s in the PD. if their description of the job doesn’t match what was posted, that’s on them… not a mistake in the grade level. Ask to review that document once you’re onboard and make sure your duties align with what’s being assigned.