LottieFiles.

it's a webflow site using lottiefiles gifs linked to your scroll position that choose what frame of the gif you're showing

idk how they went from 3d data to those images, I'd imagine whatever scanning software they use exports a lot of frames

and then you can put those frames together in something like after effects and just export a gif

use wappalyzer extension to figure it technologies in the future

Sounds like there's a market for scanofthemonth.comofthemonth.com

Possibly threeJs.