FYI, an analysis of COVID-19 superspread events is posted here. I just found it online; I was not involved with it.
Short version: The major mode of transmission (in such events, YMMV) seems to be ballistic projection of dropules while coughing, singing, or speaking loudly. Masks are recommended. Religious activities, parties, and funerals were particularly risky. Superspreading events were often upper-class, but IMHO this is probably associated with the demographics of foreign travel (as the virus is a recent import).