Welcome to the forum.
The whites look pretty white to me, so I'd agree that there doesn't appear to be any 'special' editing here. I hope you're not falling into the trap that many people do...which is thinking that photos are made & mastered on a computer. We see a lot of people asking similar questions...what do they have to do (in post processing) to get the look of this photo or that photo.
9 times out of 10, the answer lies not in post processing, but in the actual taking of the photo. Lighting, exposure, composition etc.
In this case, I think what you are 'in love' with, is the choice of background combined with the choice of clothing color combined with the choice to shoot in very soft lighting (overcast sky probably). All of those things were chosen at or before the time the photo was created....not afterward on the computer.