I don't think Larian's actually ever released a content DLC in their entire lifetime as a company, not sure if they will start now (and I'm not sure if I want them to).
They've done full "definition edition" updates (usually linked with a console re-release), and the one time they had additional content was the Flame of Vengeance expansion for Divinity 2 (Ego Draconis) when expansion packs were still a thing.
