WHO investigation is an independenct source. Many scientists have condemn racism against Asian Americans and racist right wing propagnada against China [1].
I'm not going to claim answers, but many of the scientists on the WHO investigation and in that letter have conficts of interest: careers based on collaborations with labs in China, careers based on funding labs in China, etc. Dependencies upon the continuation of Chinese government support and upon the continuation of gain-of-function research. Many of these conflicts are still undeclared. Not to mention that the WHO panel reviewers were not able to access the raw data: data was synthesized for them by scientists of the Chinese government.
Where do you think COVID came from? Can you provide independent sources to support your claim?