In Baldur's Gate 3, players can choose from a variety of subclasses for each class, though not every option found in D&D 5e is available here. One notable subclass that is not featured in the game is the Hexblade Warlock. While the subclass itself isn't available in the game, one of the Warlock's pact options at level 3 has been buffed to fill a similar role.
Baldur's Gate 3: How Pact of the Blade Works
Baldur's Gate 3 might lack the Hexblade Warlock subclass from the tabletop game, but Pact of the Blade has received a huge buff instead to compensate.