Nicholas Wade does assert that! NIAID funded it, EcoHealth was the prime contractor, Dr Shi at the Wuhan Institute of Virology was an official sub-contractor. He has a link to the NIH website.
From June 2014 to May 2019, Daszak’s EcoHealth Alliance had a grant from the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health, to do gain-of-function research with coronaviruses at the Wuhan Institute of Virology.
It’s a long read, but you can skim it.
Nicholas Wade is a serious science writer and he has smoking gun evidence.
EcoHealth was getting US grants, subcontracted out to Dr Shi at the Wuhan Institute of Virology to insert spike proteins into bat viruses to see what makes them more infectious to humans.
Also, here’s another more detailed EcoHealth proposal to DARPA, that discusses Gain of Function Research, making bat viruses more infectious to humans, and proposes subcontracting work out to Dr Shi at the Wuhan Institute of Virology. The DARPA proposal was rejected, but EcoHealth just got similar proposals funded through NIAID. This is really smoking gun evidence. They did it.
https://drasticresearch.files.wordpress.com/2021/09/main-document-preempt-volume-1-no-ess-hr00118s0017-ecohealth-alliance.pdf