Well there are several different theories on this. One is China either accidently or intentionally released it, the other is that the US intentionally released it during the World Military games that US troops participated in that were held just outside Wuhan a few months prior to it being discovered. Ron Unz believes the second, that it was released by the US, and discusses the evidence for that. Like Israel was warned by US intelligence back in November of the year covid emerged, well before that information became public.
Then the fact that an early outbreak occured in Qom Iran where all the Mullahs lived, which would seem odd since that’s an otherwise isolated city. So Unz theorized Mossad intentionally spread it there.