Thanks for the link to the nude version.
I’m no art PhD, but having read all the books I could get my hands on about Leonardo, that painting does not look like his.
It doesn’t have the “it” factor. Nothing arresting.
I don’t think it’s his. Maybe they were right in ascribing it to a student.
P.S.: It’s also suspicious that the nude version doesn’t have the pillars on the left and right that are known to have been in the original, before it was physically cropped.
Contemporary copyists drew the pillars that Leonardo included in the original painting.
Maybe the only contribution by da Vinci is the charcoal sketch which the article talks about, and the Monna Vanna oil painting we have today is by his student Salai, from the sketch.
Like the difference between comic book pencillers and inkers!