It should be apparent to the survey/grading design firm, as you noted, that the topo is incomplete in a critical area - the uphill area where the wall is proposed. If it was just an as-built survey of the driveway, then it was sufficient, but as a design survey, not enough. he property line locations, & grades in that area must be provided to design a wall or cut slope in that area, if it's even possible.
That's some steep slopes at the end of the driveway. The design makes it marginally better, in my opinion. You might consider steepening a short straight section of the driveway to get a flatter slope at the bottom without offsetting the driveway as much.