Earlier quoted context omitted.
Airborne was always known; debate was droplet vs aerosol (particle size and thus dwell time/radius). Not really a binary distinction anyway; a matter of degree.
> the World Health Organization said that there is not sufficient evidence to suggest that SARS-CoV-2 is airborne https://www.nature.com/articles/d41586-020-00974-w
It seemed pretty obvious it was aerosol but not proven early on/suppressed for reasons.