Having spent a few hours of my life since 18 JAN 2020 looking at COVID-19 (the disease caused by SARS-CoV-2) and being somewhat familiar with coronaviruses, although I'll admit I know MUCH more now than I did then, it's pretty fair to assume SARS-CoV-2 originated in China, in Hubei Province. There's evidence that it was actually circulating in the US, and around the world... and certainly in China... somewhat earlier than the official date placed in early March for the US, and certainly well before the US initiated travel restrictions. Blood bank samples have found evidence of specific antigen and antibodies, and several unexplained outbreaks of non-influenza viral pneumonia were seen in 2019.
Whether the virus was under study at the Wuhan Institute of Virology we may never know due to the removal of US National Institutes of Health personnel somewhat before this outbreak. In fact early reports of the outbreak came through an Australian connection, and a Tweet from a Chinese clinician that was subsequently removed. It became pretty obvious that, once the Chinese Communist Party apparatus understood the potential magnitude of the outbreak they shut down communication, and attempted to defeat the disease internally, but too late.
But really, where the virus came from doesn't matter, as we can't put the genie back in the bottle. And China had more illnesses and deaths, proportionately, than the US did, and took more draconian measures than the US ever contemplated. And they were unsuccessful, even with a Zero-COVID policy, in stopping spread.
Most of the information held by the US regarding COVID origins has been pretty publically accessible, and openly discussed on multiple forums. For the most part, the GOP lawmakers have been responsible for attempting to hide accurate information on the disease, efficacy of masks and other non-pharmaceutical interventions, and vaccines. If there's a conspiracy, I suspect they should look in their own house.