If that's true, then why has the WIV removed public access from their database? It serves only to remove a valuable scientific resource, and to cast suspicion on China; so why would they do such a thing? Do you genuinely believe that even with the international importance of the topic, no one in China can figure out how to keep a simple database-backed website up?
And again, Deigin et al. report assembly of the genome of a novel coronavirus from contamination in other published reads sequenced in the same facility:
https://arxiv.org/abs/2104.01533
As far as I can tell, this virus wasn't previously known outside the WIV. Am I mistaken? I emphasize again that their novel virus is relevant not because it's an ancestor of SARS-CoV-2 (it's not), but because if the WIV had one unpublished virus, it gets harder to claim it's ridiculous that they might have had others.