What's known for sure is that it didn't evolve or even alter in humans; the virus entered humans for the first time in October 2019 -- this is known because all viruses around the world have the same sequence,
New coronavirus may have started in bats. But how did it hop to humans?, and if it had dwelt in humans at all before October there would be much more variation in genomic sequences.
So the virus either evolved in animals, or in the mind and lab of a scientist, and then jumped directly to humans.
The idea that it leapt to humans from an animal is pure speculation. The virus has not been observed in animals, including bats. Moreover it's almost inconceivable that a virus could have evolved such fine tuning for human infectiousness in another species. All other zoonotic infections come into humans with maladaptations and then within humans evolve better fitness for humans.
There was the Indian paper, now retracted, that claimed that several novel parts of the new virus compared to other coronaviruses were identical to proteins in HIV. If true that would be proof of bio-engineering. It should be straightforward to settle this if that is the case.