I think it’s possible in theory, as explained in this extensive paper: https://onlinelibrary.wiley.com/doi/10.1002/bies.202000240

However, I recently received a comment from another researcher with a different perspective, saying that “in terms of a conspiracy that involves humans, the best way to evaluate its correctness, is to ask: “How many people would have to keep quiet in order for this to work.””

You can see the full comment here: https://medium.com/@ram.samudrala/this-is-interesting-well-written-and-has-some-parts-correct-but-in-terms-of-origin-of-cov-2-c8dc27e51c0c

So, at this point, I think genetically engineered SARS-COV-2 is possible in theory, but real-world evidence suggests otherwise, at least for now.