Nowadays Brazil seems to be the main source of cocaine ending up in Antwerp.

https://ticotimes.net/2019/10/03/cocaine-from-brazil-costa-rica-on-the-rise-in-europe

Many ports in Brazil and Paraguay seem to be controlled by the Primeiro Comando da Capital, arguably the most powerful organized crime group in Brazil.

Colombia (from 50% to 13% in one year) itself is now less used as a source, but the major ports in Ecuador and Costa Rica (two other cocaine transporting hubs on the rise) seem to be controlled by Colombian groups. Due to heavy law enforcement actions Colombian OCG's have shifted much of their base of operation in the international cocaine trafficking from Colombia itself to neighboring countries. Clan del Golfo (formerly known as the Urabeños or Usuga clan) are still the top players in this.

Looks like criminal groups active in the Antwerp cocaine trade still conduct most of their business with Colombian and Brazilian OCG's.
Mexican groups largely focus on North America and seem less likely to be a partner of European groups. Same case for organized crime groups based in the Dominican Republic, Haiti, Puerto Rico and El Salvador.