Is it still going to be two flag bearers or back to one?
We always pick people with Olympic history (though of course there are always rumours that someone more famous like Tsitsipas or Antetokounmpo will do it, which anyone who knows anything knows won't happen as long as there are Olympic medalists around).
Of active gold medalists, for women we have Anna Korakaki and Katerina Stefanidi, for men we have Eleftherios Petrounias, Miltiadis Tentoglou, and Stefanos Ntouskos. Korakaki and Petrounias already did it. It will probably be Stefanidi and Tentoglou. I can't see Ntouskos doing it as the rowing competition starts early, and even still, Tentoglou is much more successful than him.