PRC is definitely responsible for mis-managing this, and hiding important info.
They may possibly have actually released it from the lab by accident. The lab DOES have an abvious legit reason to study Asian coronaviruses.
But nobody would try to make a coronavirus into a bio-weapon. Why? So you can take out yourself in the process? And if your own virus doesn't wipe you out, but you succeed in pulling off a mass bio-weapon attack on the US, you're going to get nuked... we don't have any rules precluding first use (not that such rules are worth the paper they're written on).
Anyway, rest assured if it was somehow bio-engineered, that will come out. Such engineering leaves traces (which is another reason not to make bio-weapon viruses which will get traced back to you).