Nevertheless, the gain of function research with coronaviruses has been documented in the peer-reviewed literature.
The lack of new information from the Wuhan Institute, despite its longstanding research activities, is probably the most compelling evidence in support of the lab escape hypothesis.
If the evidence pointed elsewhere, it would be released. The most likely explanation is that the Institute's fingerprints are all over this thing.
The second most compelling evidence is that to date the reservoir species has not been found.
The main peer reviewed gain of function research cited is https://www.nature.com/articles/nm.3985 done in 2015 in the US with one of the researchers being Shi Zhengli of the Wuhan lab.
I'm not sure there are any papers on gain of function research done in Wuhan?