A news report with the words "Experts say.." is noise. A case documented in a journal in a trial (e.g. DANMASK-19, or any of the dozens of other trials) is not an unreasonable standard of evidence in order to better determine what the true risk of outdoor transmission is.
How exactly would you confirm - beyond any doubt - that contagion happened outside? Most people live most of their lives inside a building of one sort or another, so it'd be almost impossible to 'document' a case of outside transmission.
Even people from remote Amazon tribes in the jungle have got covid.
Also in warmer countries outdoor/indoor is not all that different ventilation wise. It is not like I am magically getting covid if I am standing just inside the door and am suddenly immune standing on the porch.
