I guess, but that imparts a level of uniform direction that isn't really known. It could very well be that the PRC government
does not know themselves whether or not covid was a lab leak, because who the fuck knows what those beaker heads were doing. They just want to be sure that if it was a lab leak, that no one ever knows.
Basically: totalitarian governments suppress everything. It's what they do. It's not like the west had clear access inside facilities like WIV before the pandemic, so why do we expect different behavior now?
I remain really dubious, personally. Imagine it was a leak. Dozens or hundreds of people -- researchers with PhDs and international cred and travel ability -- would have had to be knowledgeable about the research and in on the coverup. Someone would have swung themselves an appointment at UCSF or Johns Hopkins or wherever in exchange for blabbing.
It's an attractive conspiracy, but really that's all there is. The existing circumstantial evidence is a big nothingburger (Chinese Institute of Virology studies known Chinese Viruses; News at 11!).
The ONLY significant evidence, itself still just a single source, is that the Journal reported that it was known to western intelligence agencies at the time that there was an outbreak of something flu-like among WIV employees in October 2020. That's I guess a little suspicious, but still unconfirmed and... really not enough to move the needle.
Add to that the fact that covid is a close cousin of already-known endemic viruses and that nothing about it looks engineered at all, and... this is still just a natural virus, sorry.