There’s more detail in the FAQ. I don’t claim to know much about software, but from the FAQ pages:
“Computer vision is the process of teaching computers to recognize patterns in images. iNaturalist uses computer vision systems trained on users’ photos and identifications in order to provide automated taxon identification suggestions.”
“The computer vision model is not trained to recognize a certain species—it is trained to recognize typical iNaturalist photos of a certain species.”
https://help.inaturalist.org/en/support/solutions/folders/151000547726