Nice! I really love that we had similar ideas!
So this is made using Blender and a 3D software called PicoCAD2. I am part of alpha testing the PicoCAD2 software before release, and I just learned that the software will be released on the 16th of this month on Steam.
It is a 3D modeller, 3D texturer, and 3D animator, all with a lowpoly and pixel focus. So, the dithering is native to the software's shading, and then the program exports it as a GIF.
Really glad you liked it, thank you for your kind words!