The WHO is no longer a trustworthy source. But this is still (mostly) correct, and it's not that hard to dive into the studies directly instead of appealing to authorities. All indications are that it is possible for SARS-Cov-2 to be airborne but it is rare.

The main study from Wuhan that people cite for airborne SARS-Cov-2 only found high levels of airborne SARS-Cov-2 in poorly ventilated areas of a hospital setting (where certain medical procedures like intubation are known to generate aerosols): https://www.nature.com/articles/s41586-020-2271-3. Well-ventilated areas had very low levels. A separate study in Singapore found no airborne samples in a hospital setting (https://jamanetwork.com/journals/jama/fullarticle/2762692). Documented spreading events are consistent with the disease not being aerosolized (one example: https://twitter.com/zeynep/status/1251556084424347649).