We know, for example, that the WIV has three live coronaviruses that it works with. None of them is close to SARS-CoV-2.
We also know about a whole range of other viruses they've discovered (by sequencing RNA fragments), but which they haven't been able to culture in the lab. These include RaTG13, which they first published on in 2016. It's significant that among all these viruses they've published on over the years, none is similar enough to SARS-CoV-2 to be its ancestor.
I'll just add that some of the people we're talking about here, like Dr. Shi Zhengli, are very highly respected scientists who have contributed a huge amount to the field of virology. Just accusing them of lying with zero evidence is in pretty poor taste.
Google a reference for my first sentence.
> The genetic code of SARS-CoV-2 does not resemble that of any virus the WIV was known to be culturing in its lab, such as WIV1