They may be referring to the study below [0]. This showed that several genetic variants (lineages) of SARS-CoV2 were identified in infected people associated with the market, indicating 1) that the virus was already circulating among people before the epidemic took off, and 2) that there was more than one transmission event.
Note that no comparable data associates SARS-CoV2 with the lab in Wuhan.
[0] The Huanan Seafood Wholesale Market in Wuhan was the early epicenter of the COVID-19 pandemic https://www.science.org/doi/full/10.1126/science.abp8715
>we inferred separate introductions of SARS-CoV-2 lineages A and B into humans from likely infected animals at the Huanan market (38). We estimated the first COVID-19 case to have occurred in November 2019, with few human cases and hospitalizations occurring through mid-December. [...] the evidence presented here that lineage A, like lineage B, may have originated at the Huanan market and then spread from this epicenter into the neighborhoods surrounding the market and beyond.
Edit: Additional study:
[1] The molecular epidemiology of multiple zoonotic origins of SARS-CoV-2 https://www.science.org/doi/10.1126/science.abp8337
>We show that SARS-CoV-2 genomic diversity before February 2020 likely comprised only two distinct viral lineages, denoted “A” and “B.” Phylodynamic rooting methods, coupled with epidemic simulations, reveal that these lineages were the result of at least two separate cross-species transmission events into humans. The first zoonotic transmission likely involved lineage B viruses around 18 November 2019 (23 October to 8 December), and the separate introduction of lineage A likely occurred within weeks of this event.