Hello, and thank you for reaching out!
I didn’t initially realize this parking lot has multiple tiers, so my initial modeling was incorrect. I’ll make adjustments to better reflect the actual layout more accurately.

The original entrance (https://www.openstreetmap.org/node/3711238952) was added by user kriscarle, and I just extended the service way to model the parking lot. Looking at Esri World Imagery (Clarity) Beta, the entrance lanes can be seen more clearly, so I believe the current modeling is accurate. The additional entrance you mentioned could be incorporated; however now knowing this lot is multi-tiered, without ground level imagery, I’m cautious about adding service ways. That said, I can add the tag amenity=parking_entrance to the parking polygon.

Thanks again!