At least 10 silent mutations? https://www.forbes.com/sites/williamhaseltine/2021/12/08/omi...
The risk is much lower and what i read, the evolution is normal when it would have evolved through mice.
I'm not an expert, but it seemed plausible when I read it.
https://www.medicalnewstoday.com/articles/covid-19-did-omicr...?
I'm not a believer of a man made virus. A coronavirus would have been a bad choice either way because it mutates too easily.