Dunno. Why don't you ask the experts who put so much effort into finding the origin of not only this virus but all the others they put so much effort in finding the source of?
"Although great progress has been made in understanding the epidemiology, virology, immune response, and clinical outcomes of this disease 1 year after the start of the pandemic, the origin of the virus remains unresolved."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8057312/