Ok, it is visible on Mapillary (https://www.mapillary.com/app/?pKey=786594808706680) that shop entrance is a separate door in the tunnel, plus the tunnel can be kinda seen through from the other side (https://www.mapillary.com/app/?pKey=899748070586858). So I believe that tagging is good as it is and tunnel can be used not only by shop customers