I did say "mostly" for a reason. A few months after the FBI director made those comments the Director of National Intelligence (who oversees the FBI and the rest of the US intelligence community) released a report reiterating that an animal origin was most likely and that there wasn't evidence of a lab leak. The Wikipedia article[1] on the lab leak theory will summarize it better than I can:
> In February 2023, The Wall Street Journal reported that the US Energy Department, based on new intelligence, had shifted its view from "undecided" to "low confidence" that the pandemic originated with a lab leak. In the intelligence community, "low confidence" means the information is sourced to low-quality or otherwise untrustworthy sources. In the wake of these reports, FBI Director Christopher Wray reiterated the bureau's assessment, saying that the Government of China was doing its best to thwart any investigation. White House National Security Advisor Jake Sullivan responded to the report saying "some elements of the intelligence community have reached conclusions on one side, some on the other. A number of them have said they just don't have enough information to be sure", and there was still "no definitive answer" to the pandemic origins' question. The reassessment renewed the political debate around the issue in the US.
> In June 2023, the Office of the Director of National Intelligence declassified their report on the virus' origins, in compliance with an Act of Congress compelling it to do so. The report stated that while the lab leak theory could not be ruled out, the overall assessment of the National Intelligence Council and a majority of IC assets (with low confidence) was that the pandemic most likely began as a zoonotic event. No evidence was found that SARS-CoV-2 or a progenitor virus existed in a laboratory, and there was no evidence of any biosafety incident. Proponents of the lab leak hypothesis reacted by accusing the agencies of conspiring with the Chinese, or of being incompetent. Covering the story for the Sydney Morning Herald, its science reporter Liam Mannix wrote that the US report marked the end of the lab leak case, and that it had ended "not with a bang, but a whimper".
[1] https://en.wikipedia.org/wiki/COVID-19_lab_leak_theory#Intel...