Yes I too went down this rabbit hole about Hewitt and then the other rabbit hole about his resemblance to Prince Phillip years ago. Ultimately, I do not care to really know the details. I look at where/when he is called upon to "be a Windsor" in an official capacity, and I find that the answer is basically nowhere/never. Meanwhile, and perhaps I put too much weight to this, he does not wear the blue sash at events, like the other male Windsors.

https://people.com/royals/trooping-the-colour-uniforms-and-medals-meanings/