Larian Studios Forums Baldur's Gate III Baldur's Gate III - Mega-threads and Guides The Turn-Based/Real Time with Pause topic

From my understanding its the same way turns work in X-Com. ie all your characters get a turn (in whatever order you wish), then all the enemy characters get a turn. The actions still happen as you make them, they dont all queue up and then play out at the same time when you hit Go