The only outside greeters I’m familiar with are at the garden center, and that is only during season when all that outside area is open.
The carts are brought back from the parking lots and brought inside.
I guess you would call it the lobby area. It’s outside the store, but not outside in the elements. I would call that inside too, but I think that’s what they are meaning. I’ve been to Wal-Marts all over this region and all the surrounding states and never seen one actually outside near the parking lot.