Where is your dishwasher plug? Is anything else behind your DW?
Our DW plug is in the inside the opening where the DW sits and there are some 3/4" plywood stretcher bars on the back side of that cabinet. It's a 30 yr old house, so other DW's have fit in there just fine.
I knew DW's were taller now and made sure that we could fit them under the counter OK but now looking at most of the new ones, it seems they want the electric to exit out the side with the water lines and to site flush against the back wall of the cab.
They are not just taller but also deeper.
Is that true for all of them?