The narrative that was debunked was the "engineered in a lab" variant. This is what was debunked because this is what was pushed by conspiracy theorists at that

The narrative that was debunked was the "engineered in a lab" variant. This is what was debunked because this is what was pushed by conspiracy theorists at that time. This narrative had various claims: that Sars-cov2 contained bits of HIV (by crackpot nobelist Luc Montagnier), that it was released intentionally, that it was actually released several months earlier during the 2019 military games in order to facilitate spread and that it is a tool to cull the population of the globe. This was debunked and is still debunked. One problem with conspiracy theorists is that they have an extremely low accuracy requirement in order to consider themselves vindicated. Being on the mark right is unnecessary, even being in the ballpark right is unnecessary. For conspiracy theorists, being in the same galactic sector right is sufficient to consider it a win. The theory that it is a lab leak, possibly but not necessarily involving gain of function research, and probably by accidentally hitching a ride on one of the researchers has appeared later. It has not been debunked, though it has not been prooven either. It is a plausible possibility. It is not popular in pro-science circles, because should it be true, the popular reaction is that research should be baned because it is too dangerous which is a stupid stance equivalent to collectively burying your head in the sand. It is important to distinguish the two though.