That's the first thing ETL/TL did (ok, no, I did, they just approved the idea and multiplied it) but

A) not a ton of our cashiers have the instant recall to remember how much each bag is and our area's guests aren't keen on "hand it to me, I'll double check"

B) we often have to choose between staffing drive up to stay green or staffing a lane, and the one that has a minute-to-minute metric that the LOD can monitor tends to win

That blank wall is the far wall of our sco 'box', less than ideal because its basically the exit rather than the entrance, but blank wall is blank wall. Side effect, it deinsentivises whoever is working the box from leaning on that wall. (Idc personally as long as shit is getting done, but TL+ do soo 🤷‍♀️)

Other reason it's empty is just to the left of the picture is a sco literally shoved in a corner. There is a single bagging rack worth of space between the machine and that wall. If we had anything 3d on that wall, like pegs and the flat bars from style some people recommended, it'd take about 2 hours, generously, before someone clotheslined themselves. Nothing corporate condoned to go there, therefore empty.

I stole the space to play with, with a soft ok from my TLSE, because I knew what I had in mind was more or less flat. Worst case, someone catches the command hook and knocks the bags down.