Why would you not add a cupboard there?
Seriously, the real found Satan is the dude who just blatantly wastes this much potential storage space in a kitchen build.
It’s dead space
Looks like it’s going to be an area with an overhang for seating. Could you add storage or something useful? Yes, probably, but there are going to be high top chairs blocking it most of the time.
Perfect spot for the stuff you only touch like once a year. Things like the turkey roasting pan.
The only thing I could think of is that there’s more cabinets to be added, and that one is like a central pillar - that is, it’s surrounded by cabinets yet-to-be-added on all four sides.
Otherwise, yeah, I’d think it was really bizarre not to have a cabinet in there.
Why would you have a bunch of shallow cupboards around a big empty space.
Fill it with full-depth cupboards like the 4 behind it.