There are two separate theories here, and I think they're gettiong overlapped when they shouldn't be. One theory is that the virus was released from the lab. The other theory is that the virus was created at the lab (or at some other lab).
If the first is true, that doesn't prove the second. I don't have a big problem believing that the lab could have released the virus through negligence. There's no evidence for this yet, other than circumstantial, but there's no evidence against it either, and it's plausible.
But, separately, there are a whole lot of accusations that somebody genetically engineered this virus. Who? This is buried in prejudices and disinformation. Maybe the Chinese were doing legit research, maybe they were designing a bioweapon, maybe the Americans engineered it to attach Chinese preferentially, maybe Bill Gates and George Soros did it to depopulate the planet. I've heard all of these, but I've heard no reliable evidence that any of them are true. The "proof" that the virus was engineered keeps evaporating under scrutiny, just like the "proof" that it passed through snakes or pangolins or fish. People look at a nucleotide sequence or an amino acid sequence, and say "OMG! What are the chances of THAT happening randomly?" -- and in fact they don't understand the statistics and don't know the chances of it happening randomly, but they go ahead and post a preprint or make a claim at a conference based on "OMG" rather than statistics.
Not saying it didn't happen. But until we get some real information -- which may never happen if the perpetrators succeed with covering it up -- I'm not willing to accept it as proven, or even likely.