There's no reason to think she's stuffing. All the videos and pictures with maximum cleavage she's shown don't have anything suspicious about them. Furthermore we have 2 separate candid sightings and even that YouTube short with that Tate clown.
She'd have to stuff pretty much every time she'd go out, and her behaviour on social media suggests she got sick of the attention and disappeared. First she started hiding them, doing cardio and losing weight, then she changed her name and finally she disappeared. Wouldn't be surprised if she got a reduction by now.