With custom cabinets they would be able to fill that gap on the left and also use smaller filler for the bottom cabinet left of the range. For pre-fabricated cabinets they usually only have size increments of 3" so you end up with big fillers. The sink area upper cabinets look like a standard size and the hood cabinet is actually wider than the hood so it definitely wasn’t made custom to this hood.
With custom cabinets they would be able to fill that gap on the left and also use smaller filler for the bottom cabinet left of the range. For pre-fabricated cabinets they usually only have size increments of 3" so you end up with big fillers. The sink area upper cabinets look like a standard size and the hood cabinet is actually wider than the hood so it definitely wasn’t made custom to this hood.