This game is super quiet

[Pidgeon]

Currently a lot of this happens in the Eureka area of the game which is unfortunately quite endgame. Beyond that typically areas like Limsa Lominsa are your best bet. However, a lot of chat does happen in personalized linkshells and partially is probably related to how Japanese players tend to be a lot more quiet and prefer talking over tells. So there is not as natural a demand for a global chat channel at least overseas. Beyond Novice Network there is unfortunately not really any such thing as a global general chat. That said such a thing would be overrun by gil advertisements so it's probably for the best. I would recommend looking into the variety of FFXIV based discord groups such as The Balance discord and others, but it won't be as natural as an ingame solution unfortunately.