Yeah, that bit of editorializing by OP is a bit concerning. I worry about projection there, because I just don't see it. She's got some kind of upturned nose like she's from Whoville, and... Her eyebrows are a bit high? Is that what OP is going "ohhh, she's an underage-looking pornstar that... I happen to follow... For no reason..."? Is it some raised eyebrow/nose fetish?

Her eyes are above her ear-line, her mouth is fully-grown, her eye distance between is about adult-average... And is she missing a tooth? Not sure if that puts her younger or older, but overall, if you look at her, and even ignoring her body entirely and just focusing on the face, and go "she's clearly underage", you're looking for something specific to inside your own mind.