It is not feasible to do this probably. The WIV even claims to have completely consumed all biosamples related to RaTG13, which is the most-closely-related known virus to SARS-CoV-2. Supporting such an investigation is completely counter to their interests (speaking both of the institute and the CCP).
The overwhelming evidence is that SARS-CoV-2 emerged completely adapted to humans. This has been confirmed by the amazing lack of initial adaptation to the new human host. We only saw major changes in the spike resulting in a change in phenotype later in 2020. The proximal origins of the spike protein suggest a primate or human host. For this to happen, a natural origin in another species is astronomically improbable. It's the strongest evidence that we'll ever have as to the origins of the virus, and to this biologist it is completely indicative of what happened. We will only know the full truth if people speak out.