There are several types of 3D comics:

Because the content is (18+), it’s not on mainstream platforms like ComiXology. Try:

3D comics, also known as stereoscopic comics or 3D graphic novels, are comics that use stereoscopy to create a three-dimensional effect. This is achieved by using special glasses or other technology to combine two slightly different images, one for each eye, to create the illusion of depth.

Building characters and objects in software like Blender, ZBrush, or Daz 3D.

The rise of creators like Daval highlights a shift in the adult industry. The barrier to entry for high-quality 3D art has lowered, but the ceiling for quality has risen. Daval occupies the "premium" tier of this market, where the art is not just a vehicle for explicit content, but a standalone artistic endeavor.