I don’t think they’ve identified anything matching SARS-CoV-2 in animals though. They saw strong similarities in bat coronaviruses overall genome, but the strongest similarities of the key virulence factors were seen in pangolin coronaviruses. It’s possible SARS-CoV-2 developed in an animal and jumped, but it’s also possible it jumped then adapted in humans before the spread took offThis virus isn't a mutation of anything, it's a jump from a bat eaten or slaughtered by a human. Bats have insane immune systems, strongest in nature. So viruses that can survive in their systems tend to be extremely virulent, and this just so happened to affect human biology when it made the jump