Seems AI. Notice on Instagram, in posts with multiple pics, sometimes the clothes are the same color but the material, design, or pattern changes. Same with the jewelry.
Sadly I think you're right, one of the better ones, but still massive AI vibes with this one. The recent "videos" on the IG/Threads profile are identical in nature to the videos used to advertise AI video editing software.
The Blue dress "video" on threads has confirmed my AI suspicions. "Her" neckless appears to be glued to her body, absolutely no movement whatsoever, even when she leans forward.