As a note I've had to explain to someone else who didn't notice, but for Duelist the one-handed thing you can have a shield in your offhand and still get the bonus, that forces you into a one-handed wield on a versatile weapon
In TT 5e, Duelist applies with a shield. The rule as written is "wielding a weapon in one hand and no other weapons" a shield is not considered a weapon. This makes it an outstanding choice for sword and board fighters though a lot of people assume it doesn't work with a shield. Wording in BG3 implied it only works with an empty hand, so good that it is working as it is supposed to even if the text is wrong.
They should add a "2 hand versatile" weapon toggle into the reaction tab though.